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

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