High-flux sub-Poissonian twin-beam generation from warm atomic vapor
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866918458889863168 |
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| author | Drashni, Priya Lamsal, Hari P. White, Belle A. Crum, Noah A. Siopsis, George Li, Tian |
| author_facet | Drashni, Priya Lamsal, Hari P. White, Belle A. Crum, Noah A. Siopsis, George Li, Tian |
| contents | We demonstrate sub-Poissonian twin-beam generation via near-degenerate spontaneous four-wave mixing in warm $^{85}\mathrm{Rb}$ at 795 nm. The twin beams exhibit approximately $5.5~\mathrm{dB}$ of intensity-difference squeezing in free space and about $3~\mathrm{dB}$ after coupling into polarization-maintaining fibers. Time-resolved photon counting yields Mandel parameters of $Q \approx -0.7$ for each beam, revealing strong photon-number squeezing in each beam individually. The temporal correlation between the twin photons exhibits a distinctive flat-topped profile, reflecting multiple $χ^{(3)}$ processes in the atomic medium and showing excellent agreement with theory. This fiber-compatible, near atomic-resonance, high-flux sub-Poissonian twin-photon source is well suited for integration into scalable quantum-enhanced sensing and information processing applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_18832 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | High-flux sub-Poissonian twin-beam generation from warm atomic vapor Drashni, Priya Lamsal, Hari P. White, Belle A. Crum, Noah A. Siopsis, George Li, Tian Quantum Physics We demonstrate sub-Poissonian twin-beam generation via near-degenerate spontaneous four-wave mixing in warm $^{85}\mathrm{Rb}$ at 795 nm. The twin beams exhibit approximately $5.5~\mathrm{dB}$ of intensity-difference squeezing in free space and about $3~\mathrm{dB}$ after coupling into polarization-maintaining fibers. Time-resolved photon counting yields Mandel parameters of $Q \approx -0.7$ for each beam, revealing strong photon-number squeezing in each beam individually. The temporal correlation between the twin photons exhibits a distinctive flat-topped profile, reflecting multiple $χ^{(3)}$ processes in the atomic medium and showing excellent agreement with theory. This fiber-compatible, near atomic-resonance, high-flux sub-Poissonian twin-photon source is well suited for integration into scalable quantum-enhanced sensing and information processing applications. |
| title | High-flux sub-Poissonian twin-beam generation from warm atomic vapor |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.18832 |