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.

引用

页数：12

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[41] Stability of standing matter waves in a trap [J].