Continuous quantum measurement of a Bose-Einstein condensate: A stochastic Gross-Pitaevskii equation

被引：30
作者：
Dalvit, DAR
Dziarmaga, J
Onofrio, R
机构：
[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[2] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland
[3] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy
[4] INFM, Unita Roma 1, I-00185 Rome, Italy
[5] Ctr Stat Mech & Complex, I-00185 Rome, Italy
来源：
PHYSICAL REVIEW A | 2002年 / 65卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.65.053604
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We analyze the dynamics of a Bose-Einstein condensate undergoing a continuous dispersive imaging by using a Lindblad operator formalism. Continuous strong measurements drive the condensate out of the coherent-state description assumed within the Gross-Pitaevskii mean-field approach. Continuous weak measurements allow us instead to replace, for time scales short enough, the exact problem with its mean-field approximation through a stochastic analog of the Gross-Pitaevskii equation. The latter is used to show the unwinding of a dark soliton undergoing a continuous imaging.
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页数：12
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