Measuring irreversible dynamics of a quantum harmonic oscillator

被引：51

作者：

Morigi, G

Solano, E

Englert, BG

Walther, H

机构：

[1] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

[2] Pontificia Univ Catolica Peru, Dept Ciencias, Secc Fis, Lima, Peru

来源：

PHYSICAL REVIEW A | 2002年 / 65卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.65.040102

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We show that the unitary evolution of a harmonic oscillator coupled to a two-level system can be undone by a suitable manipulation of the two-level system-more specifically, by a quasi-instantaneous phase change. This enables us to isolate the dissipative evolution to which the oscillator may be exposed in addition. With this method we study the decoherence time of a photon mode in cavity QED, and that of the quantized harmonic motion of trapped ions. We comment on the relation to spin echoes and multipath interferometry.

引用

页数：4

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