Hybrid atom-photon quantum gate in a superconducting microwave resonator

Pritchard, J. D. and Isaacs, J. A. and Beck, M. A. and McDermott, R. and Saffman, M. (2014) Hybrid atom-photon quantum gate in a superconducting microwave resonator. Physical Review A, 89 (1). 010301. ISSN 1094-1622

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    Abstract

    We propose a hybrid quantum gate between an atom and a microwave photon in a superconducting coplanar waveguide cavity by exploiting the strong resonant microwave coupling between adjacent Rydberg states. Using experimentally achievable parameters gate fidelities >0.99 are possible on submicrosecond time scales for waveguide temperatures below 40 mK. This provides a mechanism for generating entanglement between two disparate quantum systems and represents an important step in the creation of a hybrid quantum interface applicable for both quantum simulation and quantum information processing.