Quantum state transfer via acoustic edge states in a 2D optomechanical arrayQuantum state transfer via acoustic edge states in a 2D optomechanical array Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2020-04-062019enWe propose a novel hybrid platform where solid-state spin qubits are coupled to the acoustic modes of a two-dimensional array of optomechanical (OM) nano cavities. Previous studies of coupled OM cavities have shown that in the presence of strong optical driving fields, the interplay between the photon-phonon interaction and their respective inter-cavity hopping allows the generation of topological phases of sound and light. In particular, the mechanical modes can enter a Chern insulator phase where the time-reversal symmetry is broken. In this context, we exploit the robust acoustic edge states as a chiral phononic waveguide and describe a state transfer protocol between spin qubits located in distant cavities. We analyze the performance of this protocol as a function of the relevant system parameters and show that a high-fidelity and purely unidirectional quantum state transfer can be implemented under experimentally realistic conditions. As a specific example, we discuss the implementation of such topological quantum networks in diamond based OM crystals where point defects such as silicon-vacancy centers couple to the chiral acoustic channel via strain.http://creativecommons.org/licenses/by/4.0/New Journal of Physics2111Lemonde_et_al_New J. Phys._21(11)_2019.pdfChania [Greece]Library of TUC2020-04-03application/pdf1.2 MBfree Lemonde Marc Antoine Peano Vittorio Rabl Peter Aggelakis Dimitrios Αγγελακης Δημητριος IOP Publishing Optomechanics Phononic network Quantum state transfer Silicon-vacancy Solid-state physics Topology