期刊
PHYSICAL REVIEW A
卷 85, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.85.013803
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资金
- NSERC
- Hertz Foundation
- NSF
- DARPA
- ARO
- Division Of Physics
- Direct For Mathematical & Physical Scien [0855052] Funding Source: National Science Foundation
Deterministic light-induced spin squeezing in an atomic gas is limited by photon shot noise or, equivalently, by atomic state information escaping with the light field mediating the effective atom-atom interaction. We show theoretically that the performance of cavity spin squeezing [M. H. Schleier-Smith, I. D. Leroux, and V. Vuletic, Phys. Rev. A 81, 021804 ( 2010)] can be substantially improved by erasing the light-atom entanglement, and propose several methods for doing so. Accounting for light scattering into free space, quantum erasure improves the scaling of cavity squeezing from S-1/2 to S-2/3, where S is the total atomic spin.
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