Spin squeezing via quantum feedback

被引：124

作者：

Thomsen, LK ^{[1
]}

Mancini, S

Wiseman, HM

机构：

[1] Griffith Univ, Sch Sci, Ctr Quantum Dynam, Brisbane, Qld 4111, Australia

[2] Univ Camerino, Dipartimento Fis, I-62032 Camerino, Italy

[3] Univ Milan, Dipartimento Fis, INFM, I-20133 Milan, Italy

来源：

PHYSICAL REVIEW A | 2002年 / 65卷 / 06期

关键词：

D O I：

10.1103/PhysRevA.65.061801

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose a quantum feedback scheme for producing deterministically reproducible spin squeezing. The results of a continuous nondemolition atom number measurement are fed back to control the quantum state of the sample. For large samples and strong cavity coupling, the squeezing parameter minimum scales inversely with atom number, approaching the Heisenberg limit. Furthermore, ceasing the measurement and feedback when this minimum has been reached will leave the sample in the maximally squeezed spin state.

引用

页码：618011 / 618014

页数：4

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