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Journal Article

Quantum state transfer via acoustic edge states in a 2D optomechanical array


Peano,  Vittorio
Marquardt Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Lemonde, M.-A., Peano, V., Rabl, P., & Angelakis, D. G. (2019). Quantum state transfer via acoustic edge states in a 2D optomechanical array. New Journal of Physics, 21: 113030. doi:10.1088/1367-2630/ab51f5.

Cite as: https://hdl.handle.net/21.11116/0000-0005-2045-9
We propose a novel hybrid platform where solid-state spin qubits are coupled to the acoustic modes ofa two-dimensional array of optomechanical(OM)nano cavities. Previous studies of coupled OMcavities have shown that in the presence of strong optical drivingfields, the interplay between thephoton-phonon interaction and their respective inter-cavity hopping allows the generation oftopological phases of sound and light. In particular, the mechanical modes can enter a Chern insulatorphase where the time-reversal symmetry is broken. In this context, we exploit the robust acoustic edgestates as a chiral phononic waveguide and describe a state transfer protocol between spin qubitslocated in distant cavities. We analyze the performance of this protocol as a function of the relevantsystem parameters and show that a high-fidelity and purely unidirectional quantum state transfer canbe implemented under experimentally realistic conditions. As a specific example, we discuss theimplementation of such topological quantum networks in diamond based OM crystals where pointdefects such as silicon-vacancy centers couple to the chiral acoustic channel via strain.