Schrodinger cats and their power for quantum information processing

被引：147

作者：

Gilchrist, A ^{[1
]}

Nemoto, K

Munro, WJ

Ralph, TC

Glancy, S

Braunstein, SL

Milburn, GJ

机构：

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

[2] Natl Inst Informat, Chiyoda Ku, Tokyo 1018430, Japan

[3] Hewlett Packard Labs, Bristol BS34 8QZ, Avon, England

[4] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[5] Univ York, York YO10 5DD, N Yorkshire, England

来源：

JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS | 2004年 / 6卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

quantum information processing; Schrodinger cats; quantum metrology; high precision measurements; quantum toolbox;

D O I：

10.1088/1464-4266/6/8/032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We outline a toolbox comprised of passive optical elements, single photon detection and superpositions of coherent states (Schrodinger cat states). Such a toolbox is a powerful collection of primitives for quantum information processing tasks. We illustrate its use by outlining a proposal for universal quantum computation. We utilize this toolbox for quantum metrology applications, for instance weak force measurements and precise phase estimation. We show in both these cases that a sensitivity at the Heisenberg limit is achievable.

引用

页码：S828 / S833

页数：6

共 29 条

[1] Quantum encodings in spin systems and harmonic oscillators [J].

Bartlett, SD ;

de Guise, H ;

Sanders, BC .

PHYSICAL REVIEW A, 2002, 65 (05) :4

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

Bollinger, JJ ;

Itano, WM ;

Wineland, DJ ;

Heinzen, DJ .

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

[3]

Braginsky V. B., 1995, QUANTUM MEASUREMENT

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

Braunstein, SL ;

Caves, CM ;

Milburn, GJ .

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

[5] ON THE MEASUREMENT OF A WEAK CLASSICAL FORCE COUPLED TO A QUANTUM-MECHANICAL OSCILLATOR .1. ISSUES OF PRINCIPLE [J].

CAVES, CM ;

THORNE, KS ;

DREVER, RWP ;

SANDBERG, VD ;

ZIMMERMANN, M .

REVIEWS OF MODERN PHYSICS, 1980, 52 (02) :341-392

[6] Improving quantum interferometry by using entanglement [J].

D'Ariano, GM ;

Paris, MGA ;

Perinotti, P .

PHYSICAL REVIEW A, 2002, 65 (06) :9

[7]

Dakna M, 1997, PHYS REV A, V55, P3184, DOI 10.1103/PhysRevA.55.3184

[8]

DARIANO MG, 2001, PHYS REV LETT, V87

[9] COHERENCE IN SPONTANEOUS RADIATION PROCESSES [J].

DICKE, RH .

PHYSICAL REVIEW, 1954, 93 (01) :99-110

[10] Unconditional quantum teleportation [J].

Furusawa, A ;

Sorensen, JL ;

Braunstein, SL ;

Fuchs, CA ;

Kimble, HJ ;

Polzik, ES .

SCIENCE, 1998, 282 (5389) :706-709

← 1 2 3 →