Online Seminar: Audrey Bienfait, ENS Lyon

Phonon-mediated quantum state transfer, remote entanglement and quantum erasure

SPEAKER: Dr Audrey Bienfait

AFFILIATION:  École Normale Supérieure de Lyon, France | University of Chicago, USA

HOSTED BY: A/Prof Nathan Langford, UTS Centre for Quantum Software and Information

ABSTRACT: 
Heavily used in classical signal processing, surface acoustic waves (SAWs) have also been proposed as a means to coherently couple distant solid-state quantum systems. Several groups have already reported the coherent coupling of standing SAWs modes to superconducting qubits [1-4], opening the door to the control and detection of quantum phonon states [5]. In this seminar, I will describe our recent progress in coupling superconducting qubits to propagating SAWs.
We can controllably release and capture individual itinerant photons, demonstrating quantum state transfer as well as remote entanglement generation between superconducting qubits using phonons [6]. Going a step further, I will show how two-phonon entanglement can also be generated and used to realize a fundamental quantum optics experiment, quantum erasure [7], also using phonons [8].

REFERENCES:
[1] M. V. Gustafsson, et al, Science, 346, 207-211, 2014
[2] R. Manenti, et al, Phys. Rev. B, 93, 041411, 2016
[3] B. A. Moores, Phys. Rev. Lett., 120, 2018
[4] A. N. Bolgar, et al, Phys. Rev. Lett., 120, 2018
[5] K. J. Satzinger, et al, Nature 563, 60-61, 2018
[6] A. Bienfait, et al, Science, 364, 368-371, 2019
[7] M. O. Scully and K. Drühl, Phys. Rev. A 25, 2208, 1982
[8] A. Bienfait et al., Phys. Rev X 10, 021055, 2020