Subdiffusive spreading of a Bose-Einstein condensate in random potentials
Subdiffusive spreading of a Bose-Einstein condensate in random potentials
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玻色-爱因斯坦凝聚体在随机势中的次扩散扩散
DOI:
10.1103/physreva.86.053612
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发表时间:
2012-11
影响因子:
2.9
通讯作者:
Weizhu Bao
中科院分区:
文献类型:
--
作者:
Bin Min;Tiejun Li;M. Rosenkrantz;Weizhu Bao
We study numerically the long-time dynamics of a one-dimensional Bose-Einstein condensate expanding in a speckle or impurity disorder potential. Using the mean-field Gross-Pitaevskii equation, we demonstrate subdiffusive spreading of the condensate for long times. We find that interaction-assisted hopping between normal modes leads to this subdiffusion. A possible (partial) reason why the root-mean-square (rms) width saturates in the experiment [Nature (London) 453, 891 (2008)] is provided. We suggest that observing both the participation length and the rms width of a condensate, rather than only the rms width, could provide a more complete description of the long-time behavior of ultracold atoms in disorder potentials. Our study confirms subdiffusive spreading in spatially continuous disordered interacting models and highlights new features which spatially discrete models do not possess.
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DOI:
10.1007/978-3-642-15942-8_15
发表时间:
2011
期刊:
--
影响因子:
--
作者:
S. Nazarenko
通讯作者:
S. Nazarenko
DOI:
--
发表时间:
1992
期刊:
--
影响因子:
--
作者:
通讯作者:
--
影响因子:
0.6
作者:
C. Townsend;W. Ketterle;S. Stringari
通讯作者:
C. Townsend;W. Ketterle;S. Stringari
DOI:
10.1007/bf02450553
发表时间:
1989-09
期刊:
Il Nuovo Cimento D
影响因子:
--
作者:
L. Miglio
通讯作者:
L. Miglio