Weak-force detection with superposed coherent states

被引：158

作者：

Munro, WJ ^{[1
]}

Nemoto, K

Milburn, GJ

Braunstein, SL

机构：

[1] Hewlett Packard Labs, Bristol BS34 8HZ, Avon, England

[2] Univ Wales, Sch Informat, Bangor LL57 1UT, Gwynedd, Wales

[3] CALTECH, Inst Quantum Informat, Pasadena, CA 91125 USA

[4] Univ Queensland, Ctr Quantum Comp Technol, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW A | 2002年 / 66卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.66.023819

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the utility of nonclassical states of simple harmonic oscillators, particularly a superposition of coherent states, for sensitive force detection. We find that like squeezed states, a superposition of coherent states allows displacement measurements at the Heisenberg limit. Entangling many superpositions of coherent states offers a significant advantage over a single-mode superposition state with the same mean photon number.

引用

收藏

页码：1 / 6

页数：6

相关论文

共 35 条

[1] GENERATION OF PAIR COHERENT STATES AND SQUEEZING VIA THE COMPETITION OF 4-WAVE-MIXING AND AMPLIFIED SPONTANEOUS EMISSION [J].

AGARWAL, GS .

PHYSICAL REVIEW LETTERS, 1986, 57 (07) :827-830

[2] MACROSCOPIC QUANTUM TUNNELING IN ANTIFERROMAGNETS [J].

BARBARA, B ;

CHUDNOVSKY, EM .

PHYSICS LETTERS A, 1990, 145 (04) :205-208

[3] TELEPORTING AN UNKNOWN QUANTUM STATE VIA DUAL CLASSICAL AND EINSTEIN-PODOLSKY-ROSEN CHANNELS [J].

BENNETT, CH ;

BRASSARD, G ;

CREPEAU, C ;

JOZSA, R ;

PERES, A ;

WOOTTERS, WK .

PHYSICAL REVIEW LETTERS, 1993, 70 (13) :1895-1899

[4] Entanglement-assisted classical capacity of noisy quantum channels [J].

Bennett, CH ;

Shor, PW ;

Smolin, JA ;

Thapliyal, AV .

PHYSICAL REVIEW LETTERS, 1999, 83 (15) :3081-3084

[5] Purification of noisy entanglement and faithful teleportation via noisy channels [J].

Bennett, CH ;

Brassard, G ;

Popescu, S ;

Schumacher, B ;

Smolin, JA ;

Wootters, WK .

PHYSICAL REVIEW LETTERS, 1996, 76 (05) :722-725

[6] QUANTUM CRYPTOGRAPHY WITHOUT BELL THEOREM [J].

BENNETT, CH ;

BRASSARD, G ;

MERMIN, ND .

PHYSICAL REVIEW LETTERS, 1992, 68 (05) :557-559

[7] Optimal frequency measurements with maximally correlated states [J].

Bollinger, JJ ;

Itano, WM ;

Wineland, DJ ;

Heinzen, DJ .

PHYSICAL REVIEW A, 1996, 54 (06) :R4649-R4652

[8]

Braginsky V. B, 1992, QUANTUM MEASUREMENT

[9] Dense coding for continuous variables [J].

Braunstein, SL ;

Kimble, HJ .

PHYSICAL REVIEW A, 2000, 61 (04) :4

[10] Generalized uncertainty relations: Theory, examples, and Lorentz invariance [J].

Braunstein, SL ;

Caves, CM ;

Milburn, GJ .

ANNALS OF PHYSICS, 1996, 247 (01) :135-173

← 1 2 3 4 →