Dynamics of decoherence in continuous atom-optical quantum nondemolition measurements

被引：20
作者：
Onofrio, R
Viola, L
机构：
[1] MIT, Dept Phys, Cambridge, MA 02139 USA
[2] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy
[3] MIT, Elect Res Lab, Cambridge, MA 02139 USA
[4] MIT, Dept Mech Engn, Arbeloff Lab Informat Syst & Technol, Cambridge, MA 02139 USA
[5] INFM, Sez Roma La Sapienza, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW A | 1998年 / 58卷 / 01期
关键词：
D O I：
10.1103/PhysRevA.58.69
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The Lindblad approach to continuous quantum measurements is applied to a system composed of a two-level atom interacting with a stationary quantized electromagnetic held through a dispersive coupling, fulfilling quantum nondemolition criteria. Two schemes of measurements are examined. The first one consists of measuring the atomic electric dipole, which indirectly allows one to infer the photon distribution inside the cavity. The second one schematizes a measurement of photon momentum, which permits one to describe the atomic level distribution; Decoherence of the corresponding reduced density matrices is studied in detail for both cases, and its relationship to recent experiments is finally discussed.
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收藏
页码：69 / 76
页数：8
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