期刊
PHYSICAL REVIEW A
卷 89, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.89.043837
关键词
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资金
- NIST
- NSF PFC
- ARO
- DARPA QuASAR
- NSF GRF
- NDSEG
- National Science Foundation [1125844]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1125844] Funding Source: National Science Foundation
Probing the collective spin state of an ensemble of atoms may provide a means to reduce heating via the photon recoil associated with the measurement and provide a robust, scalable route for preparing highly entangled states with spectroscopic sensitivity below the standard quantum limit for coherent spin states. The collective probing relies on obtaining a very large optical depth that can be effectively increased by placing the ensemble within an optical cavity such that the probe light passes many times through the ensemble. Here we provide expressions for measurement resolution and spectroscopic enhancement in such cavity- aided nondemolition measurements as a function of the cavity detuning. In particular, fundamental limits on spectroscopic enhancements in Rb-87 are considered.
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