Uncertainty product of an out-of-equilibrium Bose-Einstein condensate

被引:6
作者
Klaiman, S. [1 ]
Streltsov, A. I. [1 ]
Alon, O. E. [2 ]
机构
[1] Heidelberg Univ, Theoret Chem, Heidelberg, Germany
[2] Univ Haifa, Dept Phys, Tivon, Israel
来源
25TH ANNUAL INTERNATIONAL LASER PHYSICS WORKSHOP (LPHYS'16) | 2017年 / 826卷
基金
以色列科学基金会;
关键词
DENSITY-MATRICES; NOBEL LECTURE; GAS; PARTICLE; SYSTEMS;
D O I
10.1088/1742-6596/826/1/012020
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The variance and uncertainty product of the position and momentum many particle operators of structureless bosons interacting by a long-range inter-particle interaction and trapped in a single-well potential are investigated. In the first example, of an out of-equilibrium interaction-quench scenario, it is found that, despite the system being fully condensed, already when a fraction of a particle is depleted differences with respect to the mean-field quantities emerge. In the second example, of the pathway from condensation to fragmentation of the ground state, we find out that, although the cloud's density broadens while the system's fragments, the position variance actually decreases, the momentum variance increases, and the uncertainty product is not a monotonous function but has a maximum. Implication are briefly discussed.
引用
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页数:9
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