Itinerant microwave photon detector

Transcription

1 Itinerant microwave photon detector Baptiste Royer Arne L. Grimsmo Alexandre Choquette-Poitevin Alexandre Blais November 10, 2017 Intriq meeting, Bromont BR, A.L. Grimsmo, A. Choquette-Poitevin, A. Blais, arxiv:

2 Itinerant microwave photon detector Baptiste Royer Arne L. Grimsmo Alexandre Choquette-Poitevin Alexandre Blais November 10, 2017 Intriq meeting, Bromont BR, A.L. Grimsmo, A. Choquette-Poitevin, A. Blais, arxiv:

3 Optical photodetectors Detection of single infrared photons at 93% efficiency Marsili et al. Nature Photonics 7, (2013) Violation of Bell inequalities without loopholes Shalm et al. PRL 115, (2015) Giustina et al. PRL 115, (2015) Hensen et al. Nature 526, (2015) Ground-to-satellite quantum teleportation Ren et al. Nature 549, (2017) John Bell at the CERN in 1982, Howard Wiseman, Nature 510, (2014) Quantum teleportation across Calgary Valivarthi et al. Nat. Photonics 10, (2016)

4 Potential applications in microwaves Quantum information processing Sangouard et al. RMP 83, 33 (2011) Knill et al. Nature 409, (2011) Mesoscopic physics Virally et al. PRA 114, (2016) Simoneau et al. PRB 95, (R) (2017) 200 nm Quantum radars Dubos et al. PRB 63, (2001) (a) Yu-Lin et al. Chinese Physics B 22, (2013) Seth Lloyd, Science 321, (2008) Detection of dark matter Lamoreaux et al. PRD 88, (2013) science.nasa.gov

5 Why is this difficult? Frequency (Hz) Radio Microwaves Infrared Visible X-rays This talk: Design of microwave photon detector with superconducting circuits 5-10 GHz 0 1 Additional challenges Continuous in time

6 Why is this difficult? Frequency (Hz) Radio Microwaves Infrared Visible X-rays This talk: Design of microwave photon detector with superconducting circuits 5-10 GHz 0 1 Additional challenges Continuous in time Non-destructive

7 From single photon to linear detectors Desideratum Photon counter Quadratic detector ˆn =â â Homodyne measurement Linear detector ˆV / â +â What we have 0 1 0i, 1i

8 From single photon to microwave oven state Desideratum Photon counter Quadratic detector ˆn =â â Microwave oven measurement Linear detector ˆV / â +â What we have A 0i, 1i

9 From single photon to microwave oven state Desideratum Photon counter Quadratic detector ˆn =â â Microwave oven measurement Linear detector ˆV / â +â What we have 1 0 0i, 1i 0 1

10 From single photon to microwave oven state Desideratum Photon counter Quadratic detector ˆn =â â Microwave oven measurement Linear detector ˆV / â +â What we have 1 i 0i, 1i 0 i 0 1

11 From single photon to linear detectors Desideratum Photon counter Quadratic detector ˆn =â â Homodyne measurement Linear detector ˆV / â +â What we have Photon number Textbook measurement Hamiltonian: Ĥ = g zˆb ˆb(â +â ) 1 i Displacement generator 0i, 1i 0 i

12 Problem: Quantum Zeno effect 1 0 Measurement Wavefunction collapse Repeated measurement frozen state 0 1

13 Problem: Quantum Zeno effect 1 0 Measurement Wavefunction collapse Repeated measurement frozen state Measurement back-action g z /apple B Ĥ =! Bˆb ˆb + gzˆb ˆb(â +â ) =[! B + g z (â +â )]ˆb ˆb Displacement g z /apple B

14 Solution: Use more absorbers*

15 Interlude: bright and dark states

16 Interlude: bright and dark states 000i! 1 p N ( 100i + 010i + 001i + ) = Brighti Darki = 1 p 2 ( 100i 010i)

17 Multiple absorbers: no detuning Bright state Dark states = Equivalent to the single absorber model

18 Multiple absorbers: with detuning Bright state Dark states

19 Multiple absorbers: beating the Zeno effect Measurement back-action Displacement g z /apple B g z /apple B g z (1/apple B + trap )

20 Trapping the photon

21 Trapping the photon

22 Trapping the photon

23 Trapping the photon

24 Trapping the photon 2 trap [1/appleB] N

25 Main results 1 = P (1 1 photon) dark = P (1 0 photon) Time unit N=1 N=2 N=3 N= dark [apple B ]

26 Possible physical implementation Transmission line resonator = Transmon qubits Meas. drive

27 This work: BR, A.L. Grimsmo, A. Choquette-Poitevin, A. Blais, arxiv: Distributed version: A.L. Grimsmo, BR, J. M. Kreikebaum, K. O Brien, I. Siddiqi, A. Blais (in preparation) Conclusion Single photon detector High efficiency Simple set-up Non-destructive Continuous (time resolution) Distributed version More sophisticated circuit (TWPA-like) Large bandwidth ~GHz Future work Different input photon shapes Photon-number resolving?