Single-atom single-photon coupling facilitated by atomic-ensemble dark-state mechanisms
arXiv:1605.05132 · doi:10.1103/PhysRevA.94.053830
Abstract
We propose to couple single atomic qubits to photons incident on a cavity containing an atomic ensemble of a different species that mediates the coupling via Rydberg interactions. Subject to a classical field and the cavity field, the ensemble forms a collective dark state which is resonant with the input photon, while excitation of a qubit atom leads to a secondary "dark" state that splits the cavity resonance. The two different dark state mechanisms yield zero and reflection phase shifts and can be used to implement quantum gates between atomic and optical qubits.
arXiv commentRevised and published version, incorporating an appendix on the calculation of photon reflection amplitudes
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