RETRACTED: Real-time quantum feedback control of atomic spin-squeezing (Retracted Article. See vol 321, pg 489, 2008)

被引：225

作者：

Geremia, JM ^{[1
]}

Stockton, JK ^{[1
]}

Mabuchi, H ^{[1
]}

机构：

[1] CALTECH, Pasadena, CA 91125 USA

来源：

SCIENCE | 2004年 / 304卷 / 5668期

关键词：

D O I：

10.1126/science.1095374

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Real-time feedback performed during a quantum nondemolition measurement of atomic spin-angular momentum allowed us to influence the quantum statistics of the measurement outcome. We showed that it is possible to harness measurement backaction as a form of actuation in quantum control, and thus we describe a valuable tool for quantum information science. Our feedback-mediated procedure generates spin-squeezing, for which the reduction in quantum uncertainty and resulting atomic entanglement are not conditioned on the measurement outcome.

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收藏

页码：270 / 273

页数：4

相关论文

共 13 条

[1] QUANTUM NONDEMOLITION MEASUREMENT OF SMALL PHOTON NUMBERS BY RYDBERG-ATOM PHASE-SENSITIVE DETECTION [J].

BRUNE, M ;

HAROCHE, S ;

LEFEVRE, V ;

RAIMOND, JM ;

ZAGURY, N .

PHYSICAL REVIEW LETTERS, 1990, 65 (08) :976-979

[2] Quantum Kalman filtering and the Heisenberg limit in atomic magnetometry [J].

Geremia, JM ;

Stockton, JK ;

Doherty, AC ;

Mabuchi, H .

PHYSICAL REVIEW LETTERS, 2003, 91 (25)

[3] Spin squeezed atoms: A macroscopic entangled ensemble created by light [J].

Hald, J ;

Sorensen, JL ;

Schori, C ;

Polzik, ES .

PHYSICAL REVIEW LETTERS, 1999, 83 (07) :1319-1322

[4] Experimental long-lived entanglement of two macroscopic objects [J].

Julsgaard, B ;

Kozhekin, A ;

Polzik, ES .

NATURE, 2001, 413 (6854) :400-403

[5] SQUEEZED SPIN STATES [J].

KITAGAWA, M ;

UEDA, M .

PHYSICAL REVIEW A, 1993, 47 (06) :5138-5143

[6] Generation of spin squeezing via continuous quantum nondemolition measurement [J].

Kuzmich, A ;

Mandel, L ;

Bigelow, NP .

PHYSICAL REVIEW LETTERS, 2000, 85 (08) :1594-1597

[7] Continuous measurement with traveling-wave probes [J].

Silberfarb, A ;

Deutsch, IH .

PHYSICAL REVIEW A, 2003, 68 (01) :9

[8] Faraday spectroscopy in an optical lattice: a continuous probe of atom dynamics [J].

Smith, GA ;

Chaudhury, S ;

Jessen, PS .

JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS, 2003, 5 (04) :323-329

[9] Entanglement and extreme spin squeezing [J].

Sorensen, AS ;

Molmer, K .

PHYSICAL REVIEW LETTERS, 2001, 86 (20) :4431-4434

[10] Spin squeezing via quantum feedback [J].

Thomsen, LK ;

Mancini, S ;

Wiseman, HM .

PHYSICAL REVIEW A, 2002, 65 (06) :618011-618014