Transmission and generation of arbitrary W states via an optomechanical interface

Abstract

We propose a universal and nontrivial scheme to transmit and generate an arbitrary W state for multiple cavities via an optomechanical interface. In transmission and generation processes, high fidelity can be obtained by optimizing the time-dependent coupling strengths between the cavities and the mechanical resonator. With a group of optimal couplings, an arbitrary entangled W state in the multipartite system can be mapped to the pulse shape of a single photon and transmitted out of the system. In the time reversal process, an arbitrary W state can be generated with an incident single photon with certain pulse shape. The functions of the optimal couplings, which are used for both transmission and generation processes, only depend on the parameters of the system, which does not change with the arbitrary entangled W states and the pulse shape of the single photons.

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