Journal
PHYSICAL REVIEW A
Volume 94, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.94.053830
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Funding
- ARL-CDQI program [W911NF-15-2-0061]
- EU
- SFB FoQuS (FWF Project) of the Austrian Science Fund [F4016-N23]
- Marie Curie Initial Training Network COHERENCE
- Villum Foundation
- Villum Fonden [00007335] Funding Source: researchfish
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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 pi reflection phase shifts and can be used to implement quantum gates between atomic and optical qubits.
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