We propose a novel 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 sub-μs timescales 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.
@article{arxiv.1310.3910,
title = {Hybrid Atom--Photon Quantum Gate in a Superconducting Microwave Resonator},
author = {J. D. Pritchard and J. A. Isaacs and M. A. Beck and R. McDermott and M. Saffman},
journal= {arXiv preprint arXiv:1310.3910},
year = {2015}
}