Conditional Spin Squeezing of a Large Ensemble via the Vacuum Rabi Splitting

被引：134

作者：

Chen, Zilong ^{[1
]}

Bohnet, Justin G.

Sankar, Shannon R.

Dai, Jiayan

Thompson, James K.

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 13期

关键词：

QUANTUM-NONDEMOLITION MEASUREMENTS; ENTANGLEMENT; SPECTROSCOPY; STATES; LIMIT;

D O I：

10.1103/PhysRevLett.106.133601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use the vacuum Rabi splitting to perform quantum nondemolition measurements that prepare a conditionally spin squeezed state of a collective atomic psuedospin. We infer a 3.4(6) dB improvement in quantum phase estimation relative to the standard quantum limit for a coherent spin state composed of uncorrelated atoms. The measured collective spin is composed of the two-level clock states of nearly 10(6) (87)Rb atoms confined inside a low finesse F = 710 optical cavity. This technique may improve atomic sensor precision and/or bandwidth, and may lead to more precise tests of fundamental physics.

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页数：4

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