期刊
PHYSICAL REVIEW LETTERS
卷 105, 期 19, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.193602
关键词
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资金
- NSF [PHY-0903953, PHY-0969997, 0653599, 0653631]
- ONR [N00014-05-1-420]
- Division Of Physics
- Direct For Mathematical & Physical Scien [0653631, 0969997, 0653599] Funding Source: National Science Foundation
We describe a new approach to spin squeezing based on a double-pass Faraday interaction between an optical probe and an optically dense atomic sample. A quantum eraser is used to remove residual spin-probe entanglement, thereby realizing a single-axis twisting unitary map on the collective spin. This interaction can be phase matched, resulting in exponential enhancement of squeezing as a function of optical density for times short compared to the decoherence time. In practice the scaling and peak squeezing depends on decoherence, technical loss, and noise. Including these imperfections, our model indicates that similar to 10 dB of squeezing should be achievable with laboratory parameters.
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