Unitary cavity spin squeezing by quantum erasure
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-S...
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| Veröffentlicht in: | Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2012-01, Vol.85 (1), Article 013803 |
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| container_title | Physical review. A, Atomic, molecular, and optical physics |
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| creator | Leroux, Ian D. Schleier-Smith, Monika H. Zhang, Hao Vuletić, Vladan |
| description | 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 super(-1/2) to S super(-2/3) where S is the total atomic spin. |
| doi_str_mv | 10.1103/PhysRevA.85.013803 |
| format | Article |
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| ispartof | Physical review. A, Atomic, molecular, and optical physics, 2012-01, Vol.85 (1), Article 013803 |
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| source | American Physical Society Journals |
| subjects | Accounting Atomic states Compressing Entanglement Equivalence Holes Photons Shot noise |
| title | Unitary cavity spin squeezing by quantum erasure |
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