Approximation of Solitons in the Discrete NLS Equation
|
|
- Opal Shepherd
- 5 years ago
- Views:
Transcription
1 University of Massachusetts Amherst Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 8 Approximation of Solitons in the Discrete NLS Equation J Cuevas G James PG Kevrekidis University of Massachusetts - Amherst, kevrekid@math.umass.edu BA Malomed B Sanchez-Rey Follow this and additional works at: Part of the Physical Sciences and Mathematics Commons Recommended Citation Cuevas, J; James, G; Kevrekidis, PG; Malomed, BA; and Sanchez-Rey, B, "Approximation of Solitons in the Discrete NLS Equation" (8). JOURNAL OF NONLINEAR MATHEMATICAL PHYSICS. 6. Retrieved from This Article is brought to you for free and open access by the Mathematics and Statistics at ScholarWorks@UMass Amherst. It has been accepted for inclusion in Mathematics and Statistics Department Faculty Publication Series by an authorized administrator of ScholarWorks@UMass Amherst. For more information, please contact scholarworks@library.umass.edu.
2 Journal of Nonlinear Mathematical Physics Volume *, Number * (**), Article Approximation of solitons in the discrete NLS equation Jesús CUEVAS a, Guillaume JAMES b, Panayotis G KEVREKIDIS c, Boris A MALOMED d and Bernardo SÁNCHEZ-REY a. arxiv:7.87v [nlin.ps] Dec 7 a Grupo de Física No Lineal, Departamento de Física Aplicada I, E. U. Politécnica, C/ Virgen de África, 7, 4 Sevilla, Spain. jcuevas@us.es, bernardo@us.es b Institut de Mathématiques de Toulouse (UMR 59), INSA de Toulouse, 5 avenue de Rangueil, 77 Toulouse Cedex 4, France. Guillaume.James@insa-toulouse.fr c Department of Mathematics and Statistics, University of Massachusetts, Amherst MA kevrekid@math.umass.edu d Department of Physical Electronics, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel. malomed@eng.tau.ac.il Received Month *, *; Accepted in Revised Form Month *, * Abstract We study four different approximations for finding the profile of discrete solitons in the one-dimensional Discrete Nonlinear Schrödinger (DNLS) Equation. Three of them are discrete approximations (namely, a variational approach, an approximation to homoclinic orbits and a Green-function approach), and the other one is a quasi-continuum approximation. All the results are compared with numerical computations. Introduction Since the 96 s, a large number of works has focused on the properties of solitons in the Nonlinear Schrödinger (NLS) Equation []. As it is well known, the one-dimensional NLS equation is integrable. Two of the most important discretizations of this equation admit discrete solitons. One of these discretizations is known as the Ablowitz-Ladik equation [], which is also integrable. On the contrary, the other important discretization, known as the Discrete Nonlinear Schrödinger (DNLS) equation, is not integrable, and discrete soliton solutions must be calculated numerically. The DNLS equation has many interesting mathematical properties and physical applications []. The DNLS equation models, among others, an array of nonlinear-optical waveguides [4], that was originally implemented in an experiment as a set of parallel ribs made of a semiconductor material (AlGaAs) and mounted on a common substrate [5]. It was predicted [6] that the DNLS equation may also serve as a model for Bose-Einstein condensates (BECs) trapped in a strong optical lattice, which was confirmed by experiments [7]. In addition to the direct physical realizations in Copyright c 7 by J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey
3 J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey terms of nonlinear optics and BECs, the DNLS equation appears as an envelope equation for a large class of nonlinear lattices (for references, see [9], Section.4). Accordingly, the solitons known in the DNLS equation represent intrinsic localized modes investigated in such chains experimentally [] and theoretically [, ]. In this context, previous formal derivations of the DNLS equation have been mathematically justified for small amplitude time-periodic solutions in references []. In this paper we will consider fundamental solitons, which are of two types: Sievers- Takeno () modes, which are site-centered [4], and Page (P) modes, which are bondcentered [5] (see also Fig. ). They can also be seen, respectively, as discrete solitons with a single excited site, or two adjacent excited site with the same amplitude. The DNLS equation is given by i u n + ε(u n+ + u n u n ) + γ u n u n =, (.) where u n (t) are the lattice dynamical variables, the overdot stands for the time derivative, ǫ > is the lattice coupling constant and γ a nonlinear parameter. We look for solutions of frequency having the form u n (t) = e it v n. Their envelope v n satisfies v n + ε(v n+ + v n v n ) + γ v n v n =. (.) Throughout this paper, we assume γε > and choose γ = ε = without loss of generality, as Eq. (.) can be rescaled. We also look for unstaggered solutions, for which, > (staggered solutions with < can be mapped to the former upon a suitable staggering transformation ṽ n = ( ) n v n ). Furthermore, we restrict to real solutions of (.), which yield (up to multiplication by exp iθ) all the homoclinic solutions of (.) [6]. Homoclinic solutions of (.) can be found numerically using methods based on the anti-continuous limit [] and have been studied in detail (first of all, in one-dimensional models, but many results have been also obtained for two- and three-dimensional DNLS lattices) []. The aim of this paper is to compare four different analytical approximations of the profiles of - and P-modes together with the exact numerical solutions. These analytical approximations are of four types: one of variational kind, another one based on a polynomial approximation of stable and unstable manifolds for the DNLS map, another one based on a Green-function method, and, finally, a quasi-continuum approach. Discrete approximations. The variational approximation Equation (.) can be derived as the Euler-Lagrange equation for the Lagrangian L eff = + n= [ (v n+ + v n )v n ( + )vn + ] v4 n. (.) The VA for fundamental discrete solutions, elaborated in Ref. [7] (see also Ref. [8]) was based on the simple exponential ansatz, v n = A e a n, v P n = A e a n+/, (.)
4 Approximated profiles for discrete solitons in DNLS lattices.5.5 v n v n.5.5 n n Figure. Discrete soliton profiles with = ε = γ =. Left panel corresponds to a -mode, and right panel, to a P-mode. v v Figure. Dependence, for -modes, of v (left panel) and v (right panel) with respect to. Full lines correspond to the exact numerical solution and dashed lines to the variational approximation. v P v P Figure. Dependence, for P-modes, of v (left panel) and v (right panel) with respect to. Full lines correspond to the exact numerical solution while dashed lines correspond to the variational approximation.
5 4 J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey where v n denotes -modes, while v P n is for P-modes, with variational parameters A, A, a and a (which determine the amplitude and inverse size of the soliton). Then, substituting the ansatz in the Lagrangian, one can perform the summation explicitly, which yields the effective Lagrangian, L eff = N (sech a )+ N ( ) tanh a ( cosh, L P eff tanh a = N a ) + N sinha + cosh a 4 tanh a (.) The norm of the ansatz (.), which appears in Eq. (.), is given by N + n= v n. In particular, for the - and P-modes, N = A coth a, N = A /sinh a. (.4) The Lagrangian (.) gives rise to the variational equations, L eff / N = L eff / a =, and L P eff / N = L P eff / a =, which constitute the basis of the VA [9]. These predict relations between the norm, frequency, and width of the discrete solitons within the framework of the VA, namely N = 4cosh a sinh a sinh 4a sinha, N = 8( cosh a + sinha )cosh a sinha + cosh a (.5) = (sech a ) + N tanh a tanh a, = ( cosh a ) sinh a + cosh a + N tanh a. (.6) These analytical predictions, implicitly relating N and through their parametric dependence on the inverse width parameter a, will be compared with numerical findings below. In Figs. and, we compare the approximate and exact values of the highest amplitude site and the second-highest amplitude sites (i.e. v and v, which can be easily calculated from (.5) once N and a are known) with respect to for both - and P-modes.We can observe that the variational approach captures the exact asymptotic behavior as +. Indeed as a + in approximation (.) one obtains N e a and A N. Thus v as + which is indeed the asymptotic behavior of the exact -mode. On the contrary, the variational approximation errs by a small multiplicative factor (.) as (i.e., effectively approaching the continuum limit). This can be seen taking the limit a in approximation (.). One has N 8a, a + a N a and A a, while the amplitude of the continuum hyperbolic secant soliton of the integrable NLS is A = [see also below]. Notice that the P-mode also has the same limit (and therefore errs by the same factor).. The homoclinic orbit approximation.. The DNLS map The difference equation (.) can be recast as a two-dimensional real map by defining y n = v n and x n = v n [,,, 8, 6]: { xn+ = y n y n+ = yn (.7) + ( + )y n x n.
6 Approximated profiles for discrete solitons in DNLS lattices 5 =.4.5 = y y x x Figure 4. Homoclinic tangles for =.4, =.6. For >, the origin x n = y n = is hyperbolic and a saddle point, which is checked upon linearization of the map around this point. Consequently, there exists a -d stable and a -d unstable manifolds emanating from the origin in two directions given by y = λ ± x, with λ ± = ( + ) ± ( + 4). (.8) The eigenvalues λ ± satisfy λ ( + )λ + = and λ + = λ >. The stable and unstable manifolds are invariant under inversion as it is the case for eq. (.7). Moreover, they are exchanged by the symmetry (x,y) (y,x) (this is due to the fact that the map (.7) is reversible; see e.g. [6] for more details). Due to the non-integrability of the DNLS equation, these manifolds intersect in general transversally, yielding the existence of an infinity of homoclinic orbits (see Figs. 4 and 5). Each of their intersections corresponds to a localized solution, which can be a fundamental soliton or a multi-peaked one. Fundamental solitons, the solutions we are interested in, correspond to the primary intersections points, i.e. those emanating from the first homoclinic windings. Each intersection point defines an initial condition (x,y ), that is, (v,v ), and the rest of the points composing the soliton are determined by application of the map... The polynomial approximation to the unstable manifold The first windings of the stable and unstable manifolds can be approximated by third order polynomials. Actually, only one of them is necessary to be determined, as the other one is determined taking into account the symmetry x y. We proceed then to approximate the local unstable manifold Wloc u (). Taking into account its invariance under inversion, it can be locally written as a graph y = f(x) = λx αx + O( x 5 ) with λ λ + given by (.8). For x, the image of (x,f(x)) under the map (.7) also belongs to Wloc u (), thus f(x) +(+)f(x) x = f(f(x)) x. This yields [λ +α(+ λ λ )]x +O( x 5 ) =, x. Hence α = λ /( + λ λ ) = λ 4 /(λ 4 ). The local unstable manifold is approximated at order by W u : y = λx λ4 λ 4 x, (.9)
7 6 J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey 4 = 8 = 6 4 y y x x Figure 5. Homoclinic tangles for = and = y y x x Figure 6. Numerical exact unstable manifold (full line) and its approximation by Eq. (.9) (dashed line) for = (left panel) and = (right panel). The fit is so accurate in the latter that both curves are superimposed. and, by symmetry, the stable manifold is approximated by: W s : x = λy λ4 λ 4 y. (.) In Fig. 6, the numerical and approximated unstable manifolds for = and = are compared. It can be observed that the fit is better when increases. The approximation breaks down for small because the origin is not a hyperbolic fixed point for =... Approximate solutions via approximate invariant manifolds Once an analytical form of the unstable and stable manifold is found, discrete solitons profiles (or, concretely, v and v ) can be determined as the intersection of both manifolds. The polynomial form of (.9) is not sufficient in practice to obtain good approximations of the whole soliton profile, due to sensitivity under initial conditions. However, it provides a good approximation near the soliton center. Some intersections of W s and W u can be
8 Approximated profiles for discrete solitons in DNLS lattices 7 (ξ,ξ ) (ξ,ξ ).5 y (ξ,ξ ) v, v, v P.5 (ξ, ξ ) x Figure 7. (Left panel) Approximated stable and unstable manifolds for = showing the main intersections. (Right panel) Pitchfork bifurcation arising in the homoclinic approximation when is varied. -modes (full lines) bifurcate with the P-mode (dashed line) at = v.5 v Figure 8. Same as Fig. but with dashed lines corresponding to approximation (.). approximated by: ) ) x = λ (λx λ4 λ 4 x (λx λ4 λ 4 λ4 λ 4 x. (.) This equation has nine solutions (see Fig. 7a). One of them (x = ), corresponds to the origin. Once this solution is eliminated, the reminder equation is a bi-quartic one. Thus, if x = ξ is a solution of (.), x = ξ is also a solution: this is due to the fact that ±v n is a solution of (.). Solutions x = ξ, x = ξ, x = ξ and x = ξ in Fig. 7 correspond to the positive solutions of (.). The point x = ξ is in the bisectrix of the first quadrant and corresponds to the P-mode (i.e. v P = ξ ), and the point x = ξ lies in the bisectrix of the fourth quadrant and corresponds to a twisted mode (i.e. a discrete soliton with two adjacent excited sites with the same amplitude and opposite sign). Setting y(ξ ) = ξ and y(ξ ) = ξ in (.9), one obtains ξ = λ (λ )(λ 4 ), ξ = λ (λ + )(λ 4 ). Upon elimination of the roots x = ξ and x = ξ from (.), ξ and ξ can be calculated
9 8 J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey v P.5 v P Figure 9. Same as Fig. but with dashed lines corresponding to approximation (.)..5.5 v.5 v Figure. Same as Fig. but with dashed lines corresponding to approximation (.8). as solutions of a quadratic equation. Thus, ξ = λ (λ 4 )(λ λ 4)/, ξ = λ (λ 4 )(λ + λ 4)/. (.) These solutions are related with the -mode as v = ξ and v = ξ. On the other hand, for the P-mode, v P = ξ, and, v P should be determined by application of the map (.7). This yields v P = λ (λ )(λ 4 ), v P = λ 6 (λ + λ ) (λ )(λ 4 ). (.) In Figs. 8 and 9, the values of v and v obtained through the homoclinic approximation are represented versus and compared with the exact numerical results. It can be observed that, for -modes, no approximate solutions exist for <.5. For = / (i.e. λ = ), the points (ξ,ξ ) and (ξ,ξ ) disappear via a pitchfork bifurcation at (ξ,ξ ) (see Fig. 7b). This artifact is a by-product of the decreasing accuracy of our approximations as ; as discussed before, the -mode should exist for all values of >.. The Sievers Takeno approximation A method to approximate solutions of (.) has been introduced by Sievers and Takeno, for a recurrence relation similar to it but with slightly different nonlinear terms [4].
10 Approximated profiles for discrete solitons in DNLS lattices 9 This approach has been generalized to the d-dimensional DNLS equation in reference []. In what follows we briefly describe the method, incorporating some precisions and simplifications. Setting v n = v η n, equation (.) becomes η n+ η n + η n = η n v η n, (.4) with η n = η n, η =. Setting n = in (.4) we obtain in particular v = + ( η ). (.5) Equation (.4) can be rewritten as a suitable nonlocal equation using a lattice Green function in conjunction with the reflectional symmetry of η n and equation (.5). This yields for all n λ n η n = [ + ( η )] λ λ + ηk (λ n k + λ n k ), (.6) k where λ λ + is given by (.8). Problem (.6) can be seen as a fixed point equation {η} = F ({η}) in l (N ). Noting B ǫ the ball {η} l (N ) ǫ, the map F is a contraction on B ǫ provided ǫ is sufficiently small and is greater than some constant (ǫ). In that case, the solution of (.6) is unique in B ǫ by virtue of the contraction mapping theorem and it can be computed iteratively. Choosing {η} = as an initial condition, we obtain the approximate solution η n (F ()) n = + λ λ λ n, n. (.7) Obviously the quality of the approximation would increase with further iterations of F. Using (.7) and (.5) in the limit when is large, we obtain v n ( + ) / λ n (.8) since λ as λ +. The values of v and v in this approximation are compared with the exact numerical results in Fig.. We observe that the approximation captures the asymptotic behaviour of v and v for. The quasi-continuum approximation As it can be concluded from previous sections, none of the established approximations perform well for close to zero (although the VA is notably more accurate than the invariant manifold and Sievers Takeno approximation). A quasi-continuum approximation could be used to fill this gap. To this end, we follow Eqs. () and (4) of Ref. [4]. Then the - and P-modes can be approximated by the continuum soliton based expressions: v n = sech (n ), v P n = sech [( n + / /) ]. (.) These expressions lead to the results shown in Figs. and. Naturally, this approach captures the asymptotic limit v when, but fails increasingly as grows.
11 J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey v v Figure. Same as Fig. but with dashed lines corresponding to approximation (.). v P v P Figure. Same as Fig. but with dashed lines corresponding to approximation (.). 4 Summary and conclusions In Figs. and 4 the results of the paper are summarized. To this end, a variable, giving the relative error at site n, is defined as: R n = log (v approx n v exact n )/vn exact. (4.) We can generally conclude that the variational approximation offers the most accurate representation of the amplitude amplitude of the Page mode vn P at the two sites n = and n = with some small exceptions. These involve some particular intervals of where the homoclinic approximation may be better and also the interval sufficiently close to the continuum limit, where the best approximation is given by the discretization of the continuum solution. Similar features are observed for the approximation of the Sievers Takeno mode vn at site n =. However, a different scenario occurs for this mode at site n =, since the homoclinic approximation gives the best result for >.5. As goes to, the Sievers-Takeno, variational and quasi-continuum approximations give successively the best results in small windows of the parameter. Notice that in the interval (,.5] neither the variational, nor the homoclinic approximation are entirely satisfactory. The latter suffers, among other things, the serious problem of producing a spurious bifurcation of two modes with a P-mode. On the other hand, for larger values of (i.e., for >.5), the quasi-continuum approach is the one that fails increasingly becoming rather unsatisfactory, while the discrete approaches are considerably more accurate, especially for >, when their relative error drops below % (with the exception of the Sievers-Takeno approximation of v, which only reaches this precision for > ).
12 Approximated profiles for discrete solitons in DNLS lattices R R Figure. Representation of variable R defined in (4.) versus for -modes. Full lines correspond to the variational approach; the dashed line corresponds to the homoclinic approximation; the dash-dotted lines to the continuum approximation; and the dotted line to the Sievers Takeno approximation. R P 4 6 R P Figure 4. Representation of variable R defined in (4.) versus for P-modes. Full lines corresponds to variational approach; dashed line, to the homoclinic approximation; and dash-dotted lines, to the continuum approximation. We hope that these results can be used as a guide for developing sufficiently accurate analytical predictions in different parametric regimes for such systems. It would naturally be of interest to extend the present considerations to higher dimensions. However, it should be acknowledged that in the latter setting the variational approach would extend rather straightforwardly, while the homoclinic approximation is restricted to one space dimension and the other approximations would become more technical. Acknowledgments. JC and BSR acknowledge financial support from the MECD project FIS4-8. PGK gratefully acknowledges support from NSF-CAREER, NSF-DMS and NSF-DMS We acknowledge F Palmero for his useful comments.
13 J Cuevas, G James, P G Kevrekidis, B A Malomed and B Sánchez-Rey References [] Sulem C and Sulem P L, The Nonlinear Schrödinger Equation, Springer-Verlag (New York, 999). [] Ablowitz M J and Ladik J, J. Math. Phys. 6 (975) 598; J. Math. Phys. 7 (976). [] Kevrekidis P G, Rasmussen K Ø, and Bishop A R, Int. J. Mod. Phys. B 5 () 8; Dauxois T and Peyrard M, Physics of Solitons (Cambridge University Press: Cambridge, 5). [4] Christodoulides D N and Joseph R I, Opt. Lett. (988) 794. [5] Eisenberg H S, Silberberg Y, Morandotti R, Boyd A R, and Aitchison J S, Phys. Rev. Lett. 8 (998) 8; Christodoulides D N, Lederer F, and Silberberg Y, Nature 44 () 87. [6] Trombettoni A and Smerzi A, Phys. Rev. Lett. 86 () 5; Alfimov G L, Kevrekidis P G, Konotop V V, and Salerno M, Phys. Rev. E 66 () 4668; Carretero-González R and Promislow K, Phys. Rev. A 66 () 6. [7] Cataliotti F S, Burger S, Fort C, Maddaloni P, Minardi F, Trombettoni A, Smerzi A, and Inguscio M, Science 9 () 84; Greiner M, Mandel O, Esslinger T, Hänsch T W, and Bloch I, Nature 45 () 9; [8] Brazhnyi V A and Konotop V V, Modern Physics Letters B, 8 (4) 67; Porter M A, Carretero-González R, Kevrekidis P G, AND Malomed B A, Chaos 5 (5) 55; Morsch O and Oberthaler M, Rev. Mode. Phys., 78 (6) 79. [9] Aubry S, Physica D 6 (6). [] Sato M, Hubbard B E, Sievers A J, Ilic B, Czaplewski D A, and Craighead H G, Phys. Rev. Lett. 9 () 44; Sato M and Sievers A J, Nature 4 (4) 486. [] MacKay R S and Aubry S, Nonlinearity 7 (994) 6. [] Aubry S, Physica D (997) ; Flach S and Willis C R, Phys. Rep. 95 (998) 8; Tsironis G P, Chaos () 657; Campbell D K, Flach S, and Kivshar Yu S, Phys. Today 57 (4) 4. [] James G, C.R. Acad. Sci. Paris, Serie I () 58; James G, J. Nonlinear Sci. () 7; James G, Sánchez-Rey B and Cuevas J, Breathers in inhomogenous nonlinear lattices: an analysis via centre manifold reduction, Submitted (7). [4] Sievers A J, and Takeno S, Phys. Rev. Lett. 6 (988) 97. [5] Page J B, Phys. Rev. B 4 (99) 785. [6] Qin W X and Xiao X. Nonlinearity (7) 5. [7] Malomed B A and Weinstein M I. Phys. Lett. A (996) 9. [8] Carretero-González R, Talley J D, Chong C, and Malomed B A, Physica D 6 (6) 77. [9] Malomed B A, Progr. Opt. 4 () 7.
14 Approximated profiles for discrete solitons in DNLS lattices [] Hennig D, Rasmussen K Ø, Gabriel H and Bülow A, Phys. Rev. E 54 (996) [] Bountis T, Capel H W, Kollmann M, Ross J C, Bergamin J M and van der Weele J P, Phys. Lett. A 68 () 5. [] Alfimov G L, Brazhnyi V A, and Konotop V V, Physica D 94 (4) 7. [] Takeno S. J. Phys. Soc. Japan, 58 (989) 759. [4] Sánchez-Rey B, James G, Cuevas J and Archilla JFR. Phys. Rev. B, 7 (4) 4.
On localized solutions of chains of oscillators with cubic nonlinearity
On localized solutions of chains of oscillators with cubic nonlinearity Francesco Romeo, Giuseppe Rega Dipartimento di Ingegneria Strutturale e Geotecnica, SAPIENZA Università di Roma, Italia E-mail: francesco.romeo@uniroma1.it,
More informationMultistable solitons in the cubic quintic discrete nonlinear Schrödinger equation
Physica D 216 (2006) 77 89 www.elsevier.com/locate/physd Multistable solitons in the cubic quintic discrete nonlinear Schrödinger equation R. Carretero-González a,, J.D. Talley a, C. Chong a, B.A. Malomed
More informationStable higher-order vortices and quasivortices in the discrete nonlinear Schrödinger equation
PHYSICAL REVIEW E 70, 056612 (2004) Stable higher-order vortices and quasivortices in the discrete nonlinear Schrödinger equation P. G. Kevrekidis, 1 Boris A. Malomed, 2 Zhigang Chen, 3 and D. J. Frantzeskakis
More informationSpatial Disorder Of Coupled Discrete Nonlinear Schrödinger Equations
Spatial Disorder Of Coupled Discrete Nonlinear Schrödinger Equations Shih-Feng Shieh Abstract In this paper we study the spatial disorder of coupled discrete nonlinear Schrödinger (CDNLS) equations with
More informationInfluence of moving breathers on vacancies migration
Physics Letters A 315 (2003) 364 371 www.elsevier.com/locate/pla Influence of moving breathers on vacancies migration J. Cuevas a,, C. Katerji a, J.F.R. Archilla a,j.c.eilbeck b,f.m.russell b a Grupo de
More informationOUR principal focus in this paper is to study the soliton
Spatial Disorder of Soliton Solutions for 2D Nonlinear Schrödinger Lattices Shih-Feng Shieh Abstract In this paper, we employ the construction of topological horseshoes to study the pattern of the soliton
More informationSoliton dynamics in linearly coupled discrete nonlinear Schrodinger equations
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 29 Soliton dynamics in linearly coupled discrete
More informationChaotic Synchronization of Symbolic Information. in the Discrete Nonlinear Schrödinger Equation. Abstract
Chaotic Synchronization of Symbolic Information in the Discrete Nonlinear Schrödinger Equation. C. L. Pando L. IFUAP, Universidad Autónoma de Puebla, arxiv:nlin/3511v1 [nlin.cd] 8 May 23 Apdo. Postal J-48.
More informationarxiv: v2 [nlin.ps] 8 Nov 2018
Solitary waves in the Ablowitz Ladik equation with power-law nonlinearity J. Cuevas-Maraver Grupo de Física No Lineal, Departamento de Física Aplicada I, Universidad de Sevilla. Escuela Politécnica Superior,
More informationA lower bound for the power of periodic solutions of the defocusing Discrete Nonlinear Schrödinger equation
A lower bound for the power of periodic solutions of the defocusing Discrete Nonlinear Schrödinger equation J. Cuevas, Departamento de Fisica Aplicada I, Escuela Universitaria Politénica, C/ Virgen de
More informationSelf-trapped leaky waves in lattices: discrete and Bragg. soleakons
Self-trapped leaky waves in lattices: discrete and Bragg soleakons Maxim Kozlov, Ofer Kfir and Oren Cohen Solid state institute and physics department, Technion, Haifa, Israel 3000 We propose lattice soleakons:
More informationStabilization of a 3+1 -dimensional soliton in a Kerr medium by a rapidly oscillating dispersion coefficient
Stabilization of a 3+1 -dimensional soliton in a Kerr medium by a rapidly oscillating dispersion coefficient Sadhan K. Adhikari Instituto de Física Teórica, Universidade Estadual Paulista, 01 405-900 São
More informationarxiv: v1 [nlin.ps] 15 Apr 2008 Juan Belmonte-Beitia a, Vladimir V. Konotop b, Víctor M. Pérez-García a Vadym E.
Localized and periodic exact solutions to the nonlinear Schrödinger equation with spatially modulated parameters: Linear and nonlinear lattices. arxiv:84.2399v1 [nlin.ps] 15 Apr 28 Juan Belmonte-Beitia
More informationInteraction of discrete breathers with thermal fluctuations
LOW TEMPERATURE PHYSICS VOLUME 34, NUMBER 7 JULY 2008 Interaction of discrete breathers with thermal fluctuations M. Eleftheriou Department of Physics, University of Crete, P.O. Box 2208, Heraklion 71003,
More informationHigh-speed kinks in a generalized discrete phi(4) model
University of Massachusetts - Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 2008 High-speed kinks in a generalized discrete
More informationFAMILIES OF DIPOLE SOLITONS IN SELF-DEFOCUSING KERR MEDIA AND PARTIAL PARITY-TIME-SYMMETRIC OPTICAL POTENTIALS
FAMILIES OF DIPOLE SOLITONS IN SELF-DEFOCUSING KERR MEDIA AND PARTIAL PARITY-TIME-SYMMETRIC OPTICAL POTENTIALS HONG WANG 1,*, JING HUANG 1,2, XIAOPING REN 1, YUANGHANG WENG 1, DUMITRU MIHALACHE 3, YINGJI
More informationSoliton trains in photonic lattices
Soliton trains in photonic lattices Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner ICFO-Institut de Ciencies Fotoniques, and Department of Signal Theory and Communications, Universitat Politecnica
More informationTwo-dimensional discrete solitons in rotating lattices
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 7 Two-dimensional disete solitons in rotating
More informationSpontaneous symmetry breaking in photonic lattices: Theory and experiment
Physics Letters A 340 (2005) 275 280 www.elsevier.com/locate/pla Spontaneous symmetry breaking in photonic lattices: Theory and experiment P.G. Kevrekidis a,, Zhigang Chen b,c,b.a.malomed d, D.J. Frantzeskakis
More informationFractional-period excitations in continuum periodic systems
PHYSICAL REVIEW A 74, 6367 6 Fractional-period ecitations in continuum periodic systems H. E. Nistazakis, Mason A. Porter, P. G. Kevrekidis, 3 D. J. Frantzeskakis, A. Nicolin, 4 and J. K. Chin 5 Department
More informationStationary States of Bose Einstein Condensates in Single- and Multi-Well Trapping Potentials
Laser Physics, Vol., No.,, pp. 37 4. Original Tet Copyright by Astro, Ltd. Copyright by MAIK Nauka /Interperiodica (Russia). ORIGINAL PAPERS Stationary States of Bose Einstein Condensates in Single- and
More informationarxiv:nlin/ v3 [nlin.ps] 12 Dec 2005
Interaction of moving discrete reathers with vacancies arxiv:nlin/3112v3 [nlin.ps] 12 Dec 25 J Cuevas, 1 JFR Archilla, B Sánchez-Rey, FR Romero Grupo de Física No Lineal (Nonlinear Physics Group). Universidad
More informationDissipative solitons of the discrete complex cubic quintic Ginzburg Landau equation
Physics Letters A 347 005) 31 40 www.elsevier.com/locate/pla Dissipative solitons of the discrete complex cubic quintic Ginzburg Landau equation Ken-ichi Maruno a,b,, Adrian Ankiewicz b, Nail Akhmediev
More informationTransfer of BECs through Intrinsic Localized Modes (ILMs) in an Optical Lattice (OL)
Transfer of BECs through Intrinsic Localized Modes (ILMs) in an Optical Lattice (OL) David K. Campbell * Boston University Large Fluctuations meeting, Urbana May 17, 2011 * With Holger Hennig (Harvard)
More informationExact Solutions of Discrete Complex Cubic Ginzburg Landau Equation and Their Linear Stability
Commun. Theor. Phys. 56 2011) 1111 1118 Vol. 56, No. 6, December 15, 2011 Exact Solutions of Discrete Complex Cubic Ginzburg Landau Equation and Their Linear Stability ZHANG Jin-Liang ) and LIU Zhi-Guo
More informationOn N-soliton Interactions of Gross-Pitaevsky Equation in Two Space-time Dimensions
On N-soliton Interactions of Gross-Pitaevsky Equation in Two Space-time Dimensions Michail D. Todorov Faculty of Applied Mathematics and Computer Science Technical University of Sofia, Bulgaria (Work done
More informationFeshbach resonance management of Bose-Einstein condensates in optical lattices
Feshbach resonance management of Bose-Einstein condensates in optical lattices Mason A. Porter Department of Physics and Center for the Physics of Information, California Institute of Technology, Pasadena,
More informationSolitons in atomic condensates, with optical lattices and field-induced dipole moments
Solitons in atomic condensates, with optical lattices and field-induced dipole moments Lauro Tomio 1,2, H F da Luz 1, A Gammal 3 and F Kh Abdullaev 4 1 Centro de Ciências aturais e Humanas (CCH), Universidade
More informationNumerical computation of travelling breathers in Klein Gordon chains
Physica D 04 (005) 15 40 Numerical computation of travelling breathers in Klein Gordon chains Yannick Sire, Guillaume James Mathématiques pour l Industrie et la Physique, UMR CNRS 5640, Département GMM,
More informationMatter-wave soliton control in optical lattices with topological dislocations
Matter-wave soliton control in optical lattices with topological dislocations Yaroslav V. Kartashov and Lluis Torner ICFO-Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, Mediterranean
More informationExperimental characterization of optical-gap solitons in a one-dimensional photonic crystal made of a corrugated semiconductor planar waveguide
Experimental characterization of optical-gap solitons in a one-dimensional photonic crystal made of a corrugated semiconductor planar waveguide S.-P. Gorza, 1 D. Taillaert, 2 R. Baets, 2 B. Maes, 2 Ph.
More informationOn Solution of Nonlinear Cubic Non-Homogeneous Schrodinger Equation with Limited Time Interval
International Journal of Mathematical Analysis and Applications 205; 2(): 9-6 Published online April 20 205 (http://www.aascit.org/journal/ijmaa) ISSN: 2375-3927 On Solution of Nonlinear Cubic Non-Homogeneous
More informationRational homoclinic solution and rogue wave solution for the coupled long-wave short-wave system
PRAMANA c Indian Academy of Sciences Vol. 86 No. journal of March 6 physics pp. 7 77 Rational homoclinic solution and rogue wave solution for the coupled long-wave short-wave system WEI CHEN HANLIN CHEN
More informationQuantum signatures of an oscillatory instability in the Bose-Hubbard trimer
Quantum signatures of an oscillatory instability in the Bose-Hubbard trimer Magnus Johansson Department of Physics, Chemistry and Biology, Linköping University, Sweden Sevilla, July 12, 2012 Collaborators
More informationNonlinear Gap Modes in a 1D Alternating Bond Monatomic Lattice with Anharmonicity
Commun. Theor. Phys. (Beijing, China) 35 (2001) pp. 609 614 c International Academic Publishers Vol. 35, No. 5, May 15, 2001 Nonlinear Gap Modes in a 1D Alternating Bond Monatomic Lattice with Anharmonicity
More informationarxiv:nlin/ v1 [nlin.cd] 17 Jan 2002
Symbolic Dynamics of Homoclinic Orbits in a Symmetric Map arxiv:nlin/0201031v1 [nlin.cd] 17 Jan 2002 Zai-Qiao Bai and Wei-Mou Zheng Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China
More informationQUADRATIC REGULAR REVERSAL MAPS
QUADRATIC REGULAR REVERSAL MAPS FRANCISCO J. SOLIS AND LUCAS JÓDAR Received 3 November 23 We study families of quadratic maps in an attempt to understand the role of dependence on parameters of unimodal
More informationStability and instability of solitons in inhomogeneous media
Stability and instability of solitons in inhomogeneous media Yonatan Sivan, Tel Aviv University, Israel now at Purdue University, USA G. Fibich, Tel Aviv University, Israel M. Weinstein, Columbia University,
More informationQuantum q-breathers in a finite Bose-Hubbard chain: The case of two interacting bosons
PHYSICAL REVIEW B 75, 21433 27 Quantum q-breathers in a finite Bose-Hubbard chain: The case of two interacting bosons Jean Pierre Nguenang, 1,2 R. A. Pinto, 1 and Sergej Flach 1 1 Max-Planck-Institut für
More informationDiscrete solitons in photorefractive optically induced photonic lattices
Discrete solitons in photorefractive optically induced photonic lattices Nikos K. Efremidis, Suzanne Sears, and Demetrios N. Christodoulides Department of Electrical and Computer Engineering, Lehigh University,
More informationNonlinear Optics and Gap Solitons in Periodic Photonic Structures
Nonlinear Optics and Gap Solitons in Periodic Photonic Structures Yuri Kivshar Nonlinear Physics Centre Research School of Physical Sciences and Engineering Australian National University Perspectives
More informationTwo-component nonlinear Schrodinger models with a double-well potential
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 28 Two-component nonlinear Schrodinger models
More informationarxiv: v1 [nlin.ps] 14 Apr 2011
Dark-bright gap solitons in coupled-mode one-dimensional saturable waveguide arrays Rong Dong, Christian E. Rüter, Detlef Kip Faculty of Electrical Engineering, Helmut Schmidt University, 043 Hamburg,
More informationComplex Behavior in Coupled Nonlinear Waveguides. Roy Goodman, New Jersey Institute of Technology
Complex Behavior in Coupled Nonlinear Waveguides Roy Goodman, New Jersey Institute of Technology Nonlinear Schrödinger/Gross-Pitaevskii Equation i t = r + V (r) ± Two contexts for today: Propagation of
More informationAdditive resonances of a controlled van der Pol-Duffing oscillator
Additive resonances of a controlled van der Pol-Duffing oscillator This paper has been published in Journal of Sound and Vibration vol. 5 issue - 8 pp.-. J.C. Ji N. Zhang Faculty of Engineering University
More informationarxiv:nlin/ v1 [nlin.ps] 27 Nov 2002
arxiv:nlin/0211049v1 [nlin.ps] 27 Nov 2002 THE DISCRETE NONLINEAR SCHRÖDINGER EQUATION 20 YEARS ON J. CHRIS EILBECK Department of Mathematics, Heriot-Watt University, Edinburgh EH14 4AS, UK E-mail: J.C.Eilbeck@hw.ac.uk
More informationExistence and Stability of 3-site Breathers in a Triangular Lattice
Existence and Stability of 3-site Breathers in a Triangular Lattice Vassilis Koukouloyannis and Robert S. MacKay Theoretical Mechanics, Department of Physics, Aristoteleion University of Thessaloniki,
More informationDifference Resonances in a controlled van der Pol-Duffing oscillator involving time. delay
Difference Resonances in a controlled van der Pol-Duffing oscillator involving time delay This paper was published in the journal Chaos, Solitions & Fractals, vol.4, no., pp.975-98, Oct 9 J.C. Ji, N. Zhang,
More informationMultisoliton Interaction of Perturbed Manakov System: Effects of External Potentials
Multisoliton Interaction of Perturbed Manakov System: Effects of External Potentials Michail D. Todorov Faculty of Applied Mathematics and Computer Science Technical University of Sofia, Bulgaria (Work
More informationInteractions between impurities and nonlinear waves in a driven nonlinear pendulum chain
PHYSICAL REVIEW B, VOLUME 65, 134302 Interactions between impurities and nonlinear waves in a driven nonlinear pendulum chain Weizhong Chen, 1,2 Bambi Hu, 1,3 and Hong Zhang 1, * 1 Department of Physics
More informationSolitons for the cubic-quintic nonlinear Schrödinger equation with time and space modulated coefficients
Solitons for the cubic-quintic nonlinear Schrödinger equation with time and space modulated coefficients J. Belmonte-Beitia 1 and J. Cuevas 2 1 Departamento de Matemáticas, E. T. S. de Ingenieros Industriales
More informationSelf-trapping of optical vortices at the surface of an induced semi-infinite photonic lattice
University of Massachusetts Amherst From the SelectedWorks of Panos Kevrekidis March 15, 2010 Self-trapping of optical vortices at the surface of an induced semi-infinite photonic lattice DH Song CB Lou
More informationarxiv: v1 [physics.flu-dyn] 14 Jun 2014
Observation of the Inverse Energy Cascade in the modified Korteweg de Vries Equation D. Dutykh and E. Tobisch LAMA, UMR 5127 CNRS, Université de Savoie, Campus Scientifique, 73376 Le Bourget-du-Lac Cedex,
More informationBreather trapping and breather transmission in a DNA model with an interface.
Breather trapping and breather transmission in a DNA model with an interface. A Alvarez and FR Romero Grupo de Física No Lineal. Área de Física Teǿrica. Facultad de Física. Universidad de Sevilla. Avda.
More informationarxiv: v1 [nlin.cd] 20 Jul 2010
Invariant manifolds of the Bonhoeffer-van der Pol oscillator arxiv:1007.3375v1 [nlin.cd] 20 Jul 2010 R. Benítez 1, V. J. Bolós 2 1 Departamento de Matemáticas, Centro Universitario de Plasencia, Universidad
More informationExistence of Dark Soliton Solutions of the Cubic Nonlinear Schrödinger Equation with Periodic Inhomogeneous Nonlinearity
Journal of Nonlinear Mathematical Physics Volume 15, Supplement 3 (2008), 65 72 ARTICLE Existence of Dark Soliton Solutions of the Cubic Nonlinear Schrödinger Equation with Periodic Inhomogeneous Nonlinearity
More informationExcitations and dynamics of a two-component Bose-Einstein condensate in 1D
Author: Navarro Facultat de Física, Universitat de Barcelona, Diagonal 645, 0808 Barcelona, Spain. Advisor: Bruno Juliá Díaz Abstract: We study different solutions and their stability for a two component
More informationFaraday patterns in Bose-Einstein condensates
Faraday patterns in Bose-Einstein condensates Alexandru I. NICOLIN Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania Collaborators Panayotis G. Kevrekidis University
More informationInfluence of moving breathers on vacancies migration
Influence of moving reathers on vacancies migration J Cuevas a,1, C Katerji a, JFR Archilla a, JC Eileck, FM Russell a Grupo de Física No Lineal. Departamento de Física Aplicada I. ETSI Informática. Universidad
More informationarxiv: v1 [nlin.ps] 12 May 2010
Analytical theory of dark nonlocal solitons Qian Kong,2, Q. Wang 2, O. Bang 3, W. Krolikowski Laser Physics Center, Research School of Physics and Engineering, Australian National University, arxiv:005.2075v
More informationModeling Interactions of Soliton Trains. Effects of External Potentials. Part II
Modeling Interactions of Soliton Trains. Effects of External Potentials. Part II Michail Todorov Department of Applied Mathematics and Computer Science Technical University of Sofia, Bulgaria Work done
More informationAMADEU DELSHAMS AND RAFAEL RAMíREZ-ROS
POINCARÉ-MELNIKOV-ARNOLD METHOD FOR TWIST MAPS AMADEU DELSHAMS AND RAFAEL RAMíREZ-ROS 1. Introduction A general theory for perturbations of an integrable planar map with a separatrix to a hyperbolic fixed
More informationGround state on the bounded and unbounded graphs
Ground state on the bounded and unbounded graphs Dmitry Pelinovsky Department of Mathematics, McMaster University, Canada Joint work with Jeremy Marzuola, University of North Carolina, USA Workshop Mathematical
More informationHamiltonian dynamics of breathers with third-order dispersion
1150 J. Opt. Soc. Am. B/ Vol. 18, No. 8/ August 2001 S. Mookherjea and A. Yariv Hamiltonian dynamics of breathers with third-order dispersion Shayan Mookherjea* and Amnon Yariv Department of Applied Physics
More informationA Note On Solitary Wave Solutions of the Compound Burgers-Korteweg-de Vries Equation
A Note On Solitary Wave Solutions of the Compound Burgers-Korteweg-de Vries Equation arxiv:math/6768v1 [math.ap] 6 Jul 6 Claire David, Rasika Fernando, and Zhaosheng Feng Université Pierre et Marie Curie-Paris
More informationSelf-trapped optical beams: From solitons to vortices
Self-trapped optical beams: From solitons to vortices Yuri S. Kivshar Nonlinear Physics Centre, Australian National University, Canberra, Australia http://wwwrsphysse.anu.edu.au/nonlinear/ Outline of today
More informationExperimental manipulation of intrinsic localized modes in macro-mechanical system
NOLTA, IEICE Paper Experimental manipulation of intrinsic localized modes in macro-mechanical system Masayuki Kimura 1a) and Takashi Hikihara 2b) 1 School of Engineering, The University of Shiga Prefecture
More informationVector mixed-gap surface solitons
Vector mixed-gap surface solitons Yaroslav V. Kartashov, Fangwei Ye, and Lluis Torner ICFO-Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, Mediterranean Technology Park, 08860
More informationDynamics of Bosons in Two Wells of an External Trap
Proceedings of the Pakistan Academy of Sciences 52 (3): 247 254 (2015) Copyright Pakistan Academy of Sciences ISSN: 0377-2969 (print), 2306-1448 (online) Pakistan Academy of Sciences Research Article Dynamics
More informationCoding of Nonlinear States for NLS-Type Equations with Periodic Potential
Coding of Nonlinear States for NLS-Type Equations with Periodic Potential G.L. Alfimov and A.I. Avramenko Abstract The problem of complete description of nonlinear states for NLS-type equations with periodic
More informationLocalized structures in kagome lattices
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 2009 Localized structures in kagome lattices KJH
More informationResonant mode flopping in modulated waveguiding structures
Resonant mode flopping in modulated waveguiding structures Yaroslav V. Kartashov, Victor A. Vysloukh, and Lluis Torner ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, and Universitat
More informationSolitons and vortices in Bose-Einstein condensates with finite-range interaction
Solitons and vortices in Bose-Einstein condensates with finite-range interaction Luca Salasnich Dipartimento di Fisica e Astronomia Galileo Galilei and CNISM, Università di Padova INO-CNR, Research Unit
More informationRotary solitons in Bessel photonic lattices
Rotary solitons in Bessel photonic lattices Yaroslav V. Kartashov, 1,2 Victor A. Vysloukh, Lluis Torner 1 1 ICFO-Institut de Ciencies Fotoniques, and Department of Signal Theory and Communications, Universitat
More informationNonreciprocal Bloch Oscillations in Magneto-Optic Waveguide Arrays
Nonreciprocal Bloch Oscillations in Magneto-Optic Waveguide Arrays Miguel Levy and Pradeep Kumar Department of Physics, Michigan Technological University, Houghton, Michigan 49931 ABSTRACT We show that
More informationDisk-shaped Bose Einstein condensates in the presence of an harmonic trap and an optical lattice
CHAOS 18, 03101 008 Disk-shaped Bose Einstein condensates in the presence of an harmonic trap and an optical lattice Todd Kapitula, 1,a Panayotis G. Kevrekidis,,b and D. J. Frantzeskakis 3,c 1 Department
More informationThe Helically Reduced Wave Equation as a Symmetric Positive System
Utah State University DigitalCommons@USU All Physics Faculty Publications Physics 2003 The Helically Reduced Wave Equation as a Symmetric Positive System Charles G. Torre Utah State University Follow this
More informationModeling Soliton Interactions of the Perturbed Vector Nonlinear Schrödinger Equation
Bulg. J. Phys. 38 (2011) 274 283 Modeling Soliton Interactions of the Perturbed Vector Nonlinear Schrödinger Equation V.S. Gerdjikov Institute of Nuclear Research and Nuclear Energy, Bulgarian Academy
More informationStatics and dynamics of Bose-Einstein condensates in double square well potentials
PHYSICAL REVIEW E 74, 661 6 Statics and dynamics of Bose-Einstein condensates in double square well potentials E. Infeld, 1 P. Ziń, J. Gocałek, 3 and M. Trippenbach 1, 1 Soltan Institute for Nuclear Studies,
More informationSolitons of Waveguide Arrays
Solitons of Waveguide Arrays G14DIS Mathematics 4 th Year Dissertation 2010/11 School of Mathematical Sciences University of Nottingham Katie Salisbury Supervisor: Dr H Susanto Division: Applied Project
More informationExact Solutions for the Nonlinear (2+1)-Dimensional Davey-Stewartson Equation Using the Generalized ( G. )-Expansion Method
Journal of Mathematics Research; Vol. 6, No. ; 04 ISSN 96-9795 E-ISSN 96-9809 Published by Canadian Center of Science and Education Exact Solutions for the Nonlinear +-Dimensional Davey-Stewartson Equation
More informationarxiv: v3 [nlin.ps] 16 Nov 2018
arxiv:84.768v [nlin.ps] 6 Nov 8 Localized solutions of nonlinear network wave equations J. G. Caputo, I. Khames, A. Knippel and A. B. Aceves Laboratoire de Mathématiques, INSA de Rouen Normandie, 768 Saint-Etienne
More informationPersonal notes on renormalization
Personal notes on renormalization Pau Rabassa Sans April 17, 2009 1 Dynamics of the logistic map This will be a fast (and selective) review of the dynamics of the logistic map. Let us consider the logistic
More informationExistence, Stability, and Dynamics of Bright Vortices in the Cubic-Quintic Nonlinear Schr odinger Equation
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 29 Existence, Stability, and Dynamics of Bright
More informationStability of vortex solitons in a photorefractive optical lattice
Stability of vortex solitons in a photorefractive optical lattice Jianke Yang Department of Mathematics and Statistics, University of Vermont, Burlington, VT 05401, USA E-mail: jyang@emba.uvm.edu New Journal
More informationarxiv: v1 [quant-ph] 18 Mar 2008
Real-time control of the periodicity of a standing wave: an optical accordion arxiv:0803.2733v1 [quant-ph] 18 Mar 2008 T. C. Li, H. Kelkar, D. Medellin, and M. G. Raizen Center for Nonlinear Dynamics and
More informationSoliton formation and collapse in tunable waveguide arrays by electro-optic effect
Soliton formation and collapse in tunable waveguide arrays by electro-optic effect Xuewei Deng, Huiying Lao, and Xianfeng Chen* Department of Physics, the State Key Laboratory on Fiber Optic Local Area
More informationBand-gap boundaries and fundamental solitons in complex two-dimensional nonlinear lattices
HYSICAL REVIEW A 8, 8 () Band-gap boundaries and fundamental solitons in complex two-dimensional nonlinear lattices Mark J. Ablowit Department of Applied Mathematics, University of Colorado, Colorado 89-,
More informationB5.6 Nonlinear Systems
B5.6 Nonlinear Systems 5. Global Bifurcations, Homoclinic chaos, Melnikov s method Alain Goriely 2018 Mathematical Institute, University of Oxford Table of contents 1. Motivation 1.1 The problem 1.2 A
More informationWHAT IS A CHAOTIC ATTRACTOR?
WHAT IS A CHAOTIC ATTRACTOR? CLARK ROBINSON Abstract. Devaney gave a mathematical definition of the term chaos, which had earlier been introduced by Yorke. We discuss issues involved in choosing the properties
More informationModulation Instability of Spatially-Incoherent Light Beams and Pattern Formation in Incoherent Wave Systems
Modulation Instability of Spatially-Incoherent Light Beams and Pattern Formation in Incoherent Wave Systems Detlef Kip, (1,2) Marin Soljacic, (1,3) Mordechai Segev, (1,4) Evgenia Eugenieva, (5) and Demetrios
More informationIntrinsic Localized Lattice Modes and Thermal Transport: Potential Application in a Thermal Rectifier
Intrinsic Localized Lattice Modes and Thermal Transport: Potential Application in a Thermal Rectifier Michael E. Manley Condensed Matter and Materials Division, Lawrence Livermore National Laboratory,
More informationEXACT DARK SOLITON, PERIODIC SOLUTIONS AND CHAOTIC DYNAMICS IN A PERTURBED GENERALIZED NONLINEAR SCHRODINGER EQUATION
CANADIAN APPLIED MATHEMATICS QUARTERLY Volume 17, Number 1, Spring 9 EXACT DARK SOLITON, PERIODIC SOLUTIONS AND CHAOTIC DYNAMICS IN A PERTURBED GENERALIZED NONLINEAR SCHRODINGER EQUATION JIBIN LI ABSTRACT.
More informationNonlinear lattice dynamics of Bose Einstein condensates
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 2005 Nonlinear lattice dynamics of Bose Einstein
More informationNew Homoclinic and Heteroclinic Solutions for Zakharov System
Commun. Theor. Phys. 58 (2012) 749 753 Vol. 58, No. 5, November 15, 2012 New Homoclinic and Heteroclinic Solutions for Zakharov System WANG Chuan-Jian ( ), 1 DAI Zheng-De (à ), 2, and MU Gui (½ ) 3 1 Department
More informationManipulation of vortices by localized impurities in Bose-Einstein condensates
University of Massachusetts Amherst ScholarWorks@UMass Amherst Mathematics and Statistics Department Faculty Publication Series Mathematics and Statistics 29 Manipulation of vortices by localized impurities
More informationSelf-trapping of optical vortices in waveguide lattices with a self-defocusing nonlinearity
University of Massachusetts Amherst From the SelectedWorks of Panos Kevrekidis July 8, 2008 Self-trapping of optical vortices in waveguide lattices with a self-defocusing nonlinearity DH Song CB Lou LQ
More informationModulation Instability of Spatially-Incoherent Light Beams and Pattern Formation in Incoherent Wave Systems
Modulation Instability of Spatially-Incoherent Light Beams and Pattern Formation in Incoherent Wave Systems Detlef Kip, (1,2) Marin Soljacic, (1,3) Mordechai Segev, (1,4) Evgenia Eugenieva, (5) and Demetrios
More informationKINK DEGENERACY AND ROGUE WAVE FOR POTENTIAL KADOMTSEV-PETVIASHVILI EQUATION
THERMAL SCIENCE, Year 05, Vol. 9, No. 4, pp. 49-435 49 KINK DEGENERACY AND ROGUE WAVE FOR POTENTIAL KADOMTSEV-PETVIASHVILI EQUATION by Hong-Ying LUO a*, Wei TAN b, Zheng-De DAI b, and Jun LIU a a College
More informationReal-time control of the periodicity of a standing wave: an optical accordion
Real-time control of the periodicity of a standing wave: an optical accordion T. C. Li, H. Kelkar, D. Medellin, and M. G. Raizen Center for Nonlinear Dynamics and Department of Physics, The University
More information