S U M A N TA C H A K R A B O RT Y personal information Email Address Born in India, 19 March 1991 sumanta@iucaa.in; sumantac.physics@gmail.com Inter University Center for Astronomy and Astrophysics (IUCAA), Post Bag 4, Ganeshkhind, Pune University Campus, Pune 411007, India. Website http://www.sumantachakraborty.weebly.com Phone (O) +91 (20) 25604 202 short bio Sumanta Chakraborty is currently a Research Scholar working towards his Ph.D. at the Inter University Center for Astronomy and Astrophysics (IUCAA), Pune, India. He expects to graduate by the end of 2016. Throughout school, college and university he has won numerous prizes and scholarships. He has received most prestigious fellowships in India throughout his career (the Shyama Prasad Mukherjee (SPM) Fellowship, the Satyendra Nath Bose Memorial Prize, the KVPY fellowship and the INSPIRE fellowship). Further, his essay has received honorable mention in 2016 gravity essay competition. He has also published twenty seven research papers in referred international journals. education PhD in Physics Masters in Physics Bachelors in Physics Present SPM Research Fellow at IUCAA, Pune, India Working on both classical and quantum aspects of gravity. In particular Black Hole and Spacetime Thermodynamics, Alternative Gravity Theories, Extra Dimensional Models, Quantum Fields in Curved Background and Black Hole Information Paradox problem. The proposed title of my PhD thesis is Classical and Quantum Apects of Gravity in Relation to the Emergent Paradigm. Secured First rank in the IUCAA-NCRA graduate school and has obtained Grade A+. Did a graduate school project under supervision of Prof. Thanu Padmanabhan entitled Thermodynamical Variables in Lanczos-Lovelock Gravity. Advisor: Prof. Thanu Padmanabhan paddy@iucaa.in 2011 KVPY Fellow at Calcutta University, India Graded Outstanding in all four semesters. Received Satyendra Nath Bose Memorial Prize for securing first rank in the university. M.Sc. Project: Astrophysical Aspects of Alternative Gravity Theories. Advisor: Prof. Soumitra SenGupta tpssg@iacs.res.in 2008 2011 INSPIRE Fellow at Presidency College, India First rank in the university. Gold Medalist for securing first rank among all students in the college. B.Sc. Project: Liquid Crystals and Phase Transitions. Advisor: Prof. Prabir K. Mukherjee pkmuk1966@gmail.com
awards, honors (in reverse chronological order) 1. 2016 Honorable Mention 2016 Gravity research foundation annually organizes an international essay competition. Submitted essay Quantum leaps of black holes: Magnifying glasses of quantum gravity received honorable mention in the competition. 2. Shyama Prasad Mukherjee Fellowship Present This Special Fellowship is given to top four rank holders each year in the National Eligibility Test (NET), conducted by Council of Scientific and Industrial Research (CSIR), India, for pursuing Ph.D programmes, and carries the highest amount of research scholarship and research grant. 3. National Eligibility Test, First Rank The National Eligibility Test (NET) is conducted by the Council of Scientific and Industrial Research (CSIR), India, for pursuing Ph.D programmes. Secured First rank at the national level in this examination in Physical Sciences. 4. Joint Entrance Screening Test, Third Rank The Joint Entrance Screening Test (JEST) is a joint qualifying test for admissions to the Ph.D programmes in several leading research institutes in India. Secured Third rank at the national level. 5. Prof. Satyendra Nath Bose Memorial Prize For securing first rank in M.Sc. Physics examination in University of Calcutta. 6. Sujan Kumar Seal Memorial Scholarship For completion of two year M.Sc. Physics with highest marks in University of Calcutta. 7. 2011 Shyama Prasad Mookerjee Gold Medal 2011 For highest scholastic record among all the Honors graduates of Presidency college. 8. 2010 National Top One Percent 2010 Placed in national top one percent in the National Graduate Physics Examination (NGPE), 2010 conducted by Indian Association of Physics Teachers. 9. 2009 KVPY Fellowship 2009 This fellowship is given by Department of Science and Technology, India for pursuing science career to about 100 students in the whole country and carries highest amount of scholarship. 2
10. 2008 INSPIRE Fellowship 2008 2009 This fellowship is given by Department of Science and Technology, India for pursuing science career with outstanding scholastic record. research experience 1. PhD Student SPM Research Fellow at IUCAA, Pune, India 2014 Present Working on both classical and quantum aspects of gravity. In particular Black Hole and Spacetime Thermodynamics, Alternative Gravity Theories, Extra Dimensional Models, Quantum Fields in Curved Background and Black Hole Information Paradox problem. The proposed title of my PhD thesis is Classical and Quantum Apects of Gravity in Relation to Emergent Paradigm. Supervisor: Prof. Thanu Padmanabhan paddy@iucaa.in 2. 2014 Graduate School Project, IUCAA, Pune, India May-July 2014 Worked on Thermodynamical aspects of Lanzos-Lovelock gravity and submitted a project entitled Thermodynamical Variables in Lanczos-Lovelock Gravity. Advisor: Prof. Thanu Padmanabhan paddy@iucaa.in 3. M.Sc. Project, University of Calcutta, India Jan-May Worked on alternative gravity theories in Indian Association for the Cultivation of Science (IACS) and submitted a project entitled Astrophysical Aspects of Alternative Gravity Theories. Advisor: Prof. Soumitra SenGupta tpssg@iacs.res.in 4. 2012 Summer Project, IUCAA, Pune, India May-June 2012 Worked on Cosmic Microwave Background Anisotropies during a summer project at IUCAA entitled Cosmic Microwave Background and Sachs-Wolfe Effect. Advisor: Prof. Tarun Souradeep tarun@iucaa.in 5. 2011 Summer Project, Presidency College, India April-June 2011 Worked on a project entitled Liquid Crystals and Phase Transition. Advisor: Prof. Prabir K. Mukherjee pkmuk1966@gmail.com 6. 2010 Summer Project, Jadavpur University, India May-June 2010 Worked on a project entitled Particle Trajectories in Black Hole Spacetime. Advisor: Prof. Subenoy Chakraborty schakraborty.math@gmail.com publications (in referred international journals) 2016 1. Krishnamohan Parattu, Sumanta Chakraborty, Bibhas Ranjan Majhi and T. Padmanabhan, A Boundary Term for the Gravitational Action with Null Boundaries, General Relativity and Gravitation Accepted, (2016). [arxiv:1501.01053] 3
2. T. Padmanabhan, Sumanta Chakraborty and Dawood Kothawala, Spacetime with zero-point length is two-dimensional at the Planck scale, General Relativity and Gravitation 48, 55 (2016). [arxiv:1507.05669] 3. Krishnamohan Parattu, Sumanta Chakraborty and T. Padmanabhan, Variational Principle for Gravity with Null and Non-null boundaries: A Unified Boundary Counter-term, European Physical Journal C 76, 129 (2016). [arxiv:1602.07546] 4. Sumanta Chakraborty and Soumitra SenGupta, Solutions on a brane in a bulk spacetime with Kalb-Ramond field, Annals of Physics 367, 258-279 (2016). [arxiv:1412.7783] 5. Kinjalk Lochan and Sumanta Chakraborty, Discrete quantum spectrum of black holes, Physics Letters B 755, 37-42 (2016). [arxiv:1509.09010] 2015 6. Sumanta Chakraborty and Naresh Dadhich, Brown-York quasilocal energy in Lanczos-Lovelock gravity and black hole horizons, Journal of High Energy Physics 1512, 003 (2015). [arxiv:1509.02156] 7. Sumanta Chakraborty and Soumitra SenGupta, Effective field equation on m-brane embedded in n-dimensional bulk of Einstein and f(r) gravity, European Physical Journal C 75, 538 (2015). [arxiv:1504.07519] 8. Sumanta Chakraborty and T. Padmanabhan, Thermodynamical interpretation of geometrical variables associated with null surfaces, Physical Review D 92, 104011 (2015). [arxiv:1508.04060] 9. Sumanta Chakraborty, Krishnamohan Parattu and T. Padmanabhan, Gravitational field equations near an arbitrary null surface expressed as a thermodynamic identity, Journal of High Energy Physics 1510, 097 (2015). [arxiv:1505.05297] 10. Sumanta Chakraborty, Aspects of Neutrino Oscillation in Alternative Gravity Theories, Journal of Cosmology and Astroparticle Physics 1510, 019 (2015). [arxiv:1506.02647] 11. Sumanta Chakraborty, Lanczos-Lovelock gravity from a thermodynamic perspective, Journal of High Energy Physics 1508, 029 (2015). [arxiv:1505.07272] 12. Sumanta Chakraborty and Soumitra SenGupta, Metric factorizability and equivalence of brane world models with Brans-Dicke theory, Physical Review D 92, 024059 (2015). [arxiv:1502.00783] 13. Sumanta Chakraborty, Suprit Singh and T. Padmanabhan, A quantum peek inside the black hole event horizon, Journal of High Energy Physics 1506, 192 (2015). [arxiv:1503.01774] 14. Sumanta Chakraborty, Equilibrium configuration of perfect fluid orbiting around black holes in some classes of alternative gravity theories, Classical and Quantum Gravity 32, 075007 (2015). [arxiv:1406.0417] 15. Sumanta Chakraborty and Soumitra SenGupta, Spherically symmetric brane spacetime in bulk f (R) gravity, European Physical Journal C 75, 11 (2015). [arxiv:1409.4115] 4
2014 16. Sumanta Chakraborty and T. Padmanabhan, Evolution of Spacetime arises due to the departure from Holographic Equipartition in all Lanczos-Lovelock Theories of Gravity, Physical Review D 90, 124017 (2014) [arxiv:1408.4679] 17. Sumanta Chakraborty and T. Padmanabhan, Geometrical variables with direct thermodynamic significance in Lanczos-Lovelock gravity, Physical Review D 90, 084021 (2014). [arxiv:1408.4791] 18. Sumanta Chakraborty and Soumitra SenGupta, Radion cosmology and stabilization, European Physical Journal C 74, 3045 (2014). [arxiv:1306.0805] 19. Sumanta Chakraborty and Soumitra SenGupta, Higher curvature gravity at the LHC, Physical Review D 90, 047901 (2014). [arxiv:1403.3164] 20. Suprit Singh and Sumanta Chakraborty, Black hole kinematics: the in vacuum energy density and flux for different observers, Physical Review D 90, 024011 (2014). [arxiv:1404.0684] 21. Sumanta Chakraborty and Soumitra SenGupta, Bulk scalar field in warped extra dimensional models, Physical Review D 89, 126001 (2014). [arxiv:1401.3279] 22. Bibhas Ranjan Majhi and Sumanta Chakraborty, Anomalous effective action, Noether current, Virasoro algebra and Horizon entropy, European Physical Journal C 74, 2867 (2014). [arxiv:1311.1324] 23. Sumanta Chakraborty, Constraining alternative gravity theories using the solar neutrino problem, Classical and Quantum Gravity 31, 055005 (2014). [arxiv:1309.0693] 24. Sumanta Chakraborty and Soumitra SenGupta, Solar system constraints on alternative gravity theories, Physical Review D 89, 026003 (2014). [arxiv:1208.1433] 25. Sumanta Chakraborty, Velocity measurements in some classes of alternative gravity theories, Astrophysics and Space Science 347, 411-421 (). [arxiv:1210.1569] 2011 26. Prabir. K. Mukherjee, Sumanta Chakraborty and Sylwester. J. Rzoska, Non-linear dielectric effect in the isotropic phase above the isotropic-cholesteric phase transition, Chemical Physics 389, 64-67 (2011). [arxiv:1112.1063] 27. Sumanta Chakraborty and Subenoy Chakraborty, Trajectory around a spherically symmetric non-rotating black hole, Canadian Journal of Physics 89, 689-695 (2011). [arxiv:1109.0676] computer skills Basic Intermediate Advanced Fortran. LATEX, OpenOffice, Linux, Microsoft Windows. Mathematica. 5
selected talks 2016 Gravity and Thermodynamics: The Importance of being Null, at Department of Theoretical Physics, Indian Association for the Cultivation of science, 19th may, 2016. Gravity and Thermodynamics: The Importance of being Null, at Department of Theoretical Physics, Saha Institute of Nuclear Physics, Kolkata, 17th March, 2016. From Spacetime Geometry to Thermodynamics, at Physics Department, Presidency University, Kolkata, 16th March, 2016. 2015 Discrete Quantum Spectrum of Black Holes, at International Conference on Gravitation and Cosmology, IISER Mohali, 17th December, 2015. Thermodynamics of Null Surfaces, at International Conference on Gravitation and Cosmology, IISER Mohali, 14th December, 2015. General Relativity and Principle of Least Action, at Department of Physics, IIT Chennai, 5th November, 2015. The Dynamical Evolution of the Spacetime and Equipartition, at Theoretical Physics Department, Institute of Mathematical Sciences, Chennai, 4th November, 2015. Thermodynamic Interpretation of Geometrical Variables Associated with Null Surfaces, at the International Workshop on Astroparticle Physics and Cosmology, Saha Institute for Nuclear Physics, Kolkata, 12-17 October, 2015. Action Principle for General Relativity and its Relation to Null Surfaces, at Physics and Applied Mathematics Department, Indian Statistical Institute, Kolkata, 8th October, 2015. The Dynamical Evolution of the Spacetime, at Department of Theoretical Sciences, S.N. Bose Center for Basic Sciences, Kolkata, 7th October, 2015. Action Principle in General Relativity, at Theoretical Physics Department, Indian Association for the Cultivation of Science, Kolkata, 5th October, 2015. Principle of Least Action in General Relativity, at Theoretical Physics Department, Physical Research Laboratory, Ahmedabad, 3rd September, 2015. From Spacetime Geometry to Thermodynamics, at Indian Institute of Technology, Gandhinagar, 2nd September, 2015. Extra Dimension with Radion and Torsion, at Indian Association for the Cultivation of Science, Kolkata, 30th July, 2015. A quantum peek inside the black hole event horizon, at Indian Association for the Cultivation of Science, Kolkata, 21st April, 2015. 6
Evolution of spacetime arises due to the departure from holographic equipartition in all Lanczos-Lovelock theories of gravity at the 33rd meeting of the Astronomical Society of India (ASI), National Center for Radio Astrophysics (NCRA), Pune, 17-20 February, 2015. 2014 Higher Curvature Gravity: Extra Dimensions and Phenomenology at Indian Association for the Cultivation of Science, Kolkata, 21st October, 2014. From Dynamical Evolution of Spacetime to Holographic Equipartition at Indian Association for the Cultivation of Science, Kolkata, 25th September, 2014. Black Holes: The Inside Story at Department of Physics, University of Calcutta, Kolkata 24th September, 2014. other academic distinctions 1. Secured fifth rank in physical sciences in the National Eligibility Test (NET) conducted by CSIR-UGC, Government of India in December, 2012. 2. Nirode Baran Bakshi memorial prize, 2011, for securing first rank from Presidency college in B.Sc. examination. 3. Awarded Millennium prize, 2011 for securing the highest percentage of marks in all science examinations by Millennium Re-Union committee of Statistics Department of Calcutta university. 4. Scindia Silver Medal, 2010 for securing highest marks in B.Sc. examination among the students of Presidency college. 5. Jyotish Ch. Chakraborti scholarship, 2009 for securing highest marks in B.Sc. examination among the students of Presidency college. IUCAA, Pune, India June 3, 2016 7