Noise-free measurement of harmonic oscillators with instantaneous interactions

被引：0

作者：

Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, 30161-970, MG, Brazil ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

不详 ^{[4
]}

机构：

[1] Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, 30161-970, MG

[2] Max-Planck-Institut für Quantenoptik, D-85748 Garching

[3] Physics Department, ASC, Ludwig-Maximilians-Universität, 80333 Munich

[4] Sección Física, Departamento de Ciencias, Pontificia Universidad Católica Del Perú, Lima

来源：

Phys Rev Lett | 2007年 / 2卷

关键词：

Ions - Microwaves - Quantum theory;

D O I：

10.1103/PhysRevLett.98.020401

中图分类号：

学科分类号：

摘要：

We present a method of measuring the quantum state of a harmonic oscillator through instantaneous probe-system selective interactions of the Jaynes-Cummings type. We prove that this scheme is robust to general decoherence mechanisms, allowing the possibility of measuring fast-decaying systems in the weak-coupling regime. This method could be applied to different setups: motional states of trapped ions, microwave fields in cavity or circuit QED, and even intracavity optical fields. © 2007 The American Physical Society.

引用

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