Orientation-Dependent Entanglement Lifetime in a Squeezed Atomic Clock

被引：147

作者：

Leroux, Ian D. ^{[1
]}

Schleier-Smith, Monika H.

Vuletic, Vladan

机构：

[1] MIT, Dept Phys, MIT Harvard Ctr Ultracold Atoms, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 25期

基金：

加拿大自然科学与工程研究理事会;

关键词：

STATES; LIMIT; IONS;

D O I：

10.1103/PhysRevLett.104.250801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study experimentally the application of a class of entangled states, squeezed spin states, to the improvement of atomic-clock precision. In the presence of anisotropic noise, the entanglement lifetime is strongly dependent on squeezing orientation. We measure the Allan deviation spectrum of a clock operated with a phase-squeezed input state. For averaging times up to 50 s the squeezed clock achieves a given precision 2.8(3) times faster than a clock operating at the standard quantum limit.

引用

页数：4

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