Spatially homogeneous entanglement for matter-wave interferometry created with time-averaged measurements

被引：16

作者：

Cox, Kevin C. ^{[1
]}

Greve, Graham P. ^{[1
]}

Wu, Baochen ^{[1
]}

Thompson, James K. ^{[1
]}

机构：

[1] Univ Colorado, NIST, JILA, 440 UCB, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 06期

基金：

美国国家科学基金会;

关键词：

STANDARD QUANTUM LIMIT; ATOMIC CLOCK; NOISE;

D O I：

10.1103/PhysRevA.94.061601

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate a method to generate spatially homogeneous entangled, spin-squeezed states of atoms appropriate for maintaining a large amount of squeezing even after release into the arm of a matter-wave interferometer or other free-space quantum sensor. Using an effective intracavity dipole trap, we allow atoms to move along the cavity axis and time average their coupling to the standing wave used to generate entanglement via collective measurements, demonstrating 11(1) dB of directly observed spin squeezing. Our results show that time averaging in collective measurements can greatly reduce the impact of spatially inhomogeneous coupling to the measurement apparatus.

引用

页数：5

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