Sub-Planck structures and Quantum Metrology\

被引：3

作者：

Panigrahi, Prasanta K. ^{[1
]}

Kumar, Abhijeet ^{[2
]}

Roy, Utpal ^{[3
]}

Ghosh, Suranjana ^{[3
]}

机构：

[1] Indian Inst Sci Educ & Res Kolkata, Kolkata, India

[2] Indian Inst Sci Educ & Res, Pune, Maharashtra, India

[3] Indian Inst Technol, Patna, Bihar, India

来源：

75 YEARS OF QUANTUM ENTANGLEMENT: FOUNDATIONS AND INFORMATION THEORETIC APPLICATIONS | 2011年 / 1384卷

关键词：

Sub-Planck structure; Heisenberg-limited measurements; Entanglement; Quantum metrology; COHERENT STATES; PHASE-SPACE; CRITERION; GEOMETRY;

D O I：

10.1063/1.3635847

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The significance of sub-Planck structures in relation to quantum metrology is explored, in close contact with experimental setups. It is shown that an entangled cat state can enhance the accuracy of parameter estimations. The possibilty of generating this state, in dissipative systems has also been demonstrated. Thereafter, the quantum Cramer-Rao bound for phase estimation through a pair coherent state is calculated, which achieves the maximum possible resolution in an interferometer.

引用

页码：84 / 90

页数：7

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