Single-photon source with sub-MHz linewidth for cesium-based quantum information processing

A single-photon source with narrow bandwidth, high purity, and large brightness can efficiently interact with material qubits strongly coupled to an optical microcavity for quantum information processing. Here, we experimentally demonstrate a degenerate doubly resonant single-photon source at 852 nm...

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Bibliographic Details
Published in:Frontiers of physics 2023-12, Vol.18 (6), p.61303, Article 61303
Main Authors: He, Hai, Yang, Peng-Fei, Zhang, Peng-Fei, Li, Gang, Zhang, Tian-Cai
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Atomic
Bandwidths
Cesium
Condensed Matter Physics
Data processing
Electrons
Information processing
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Photons
Physics
Physics and Astronomy
Purity
Quantum phenomena
Qubits (quantum computing)
Research Article
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Summary:A single-photon source with narrow bandwidth, high purity, and large brightness can efficiently interact with material qubits strongly coupled to an optical microcavity for quantum information processing. Here, we experimentally demonstrate a degenerate doubly resonant single-photon source at 852 nm by the cavity-enhanced spontaneous parametric down-conversion process with a 100% duty cycle of generation. The single photon source possesses both high purity with a second-order correlation g h (2) (0) = 0.021 and narrow linewidth with Δ ν sp = (800 ± 13) kHz. The single-photon source is compatible with the cesium atom D2 line and can be used for cesium-based quantum information processing.
ISSN:2095-0462
2095-0470
DOI:10.1007/s11467-023-1317-z