Hybrid atom-photon quantum gate in a superconducting microwave resonator
Jonathan D. Pritchard, Joshua Isaacs, M. A. Beck, R. McDermott, Mark E. Saffman · Physical Review A · 2014
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.