Cavity-aided nondemolition measurements for atom counting and spin squeezing

被引：50

作者：

Chen, Zilong

Bohnet, Justin G.

Weiner, Joshua M.

Cox, Kevin C.

Thompson, James K.

机构：

[1] Univ Colorado, JILA, NIST, Boulder, CO 80309 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW A | 2014年 / 89卷 / 04期

基金：

美国国家科学基金会;

关键词：

QUANTUM; ENTANGLEMENT; GENERATION; VACUUM; CLOCK;

D O I：

10.1103/PhysRevA.89.043837

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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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页数：17

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