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arXiv 1009.3302cond-mat.quant-gas
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Bogoliubov不等式与空间相互作用原子的玻色-爱因斯坦凝聚体性质$D \le 2$

The Bogoliubov inequality and the nature of Bose-Einstein condensates for interacting atoms in spatial dimensions $D \le 2$

Moorad Alexanian

摘要:

考虑了Bogoliubov不等式对空间维数D </-2且存在任意外势(可以是封闭的“盒子”势、周期势或无序势)的相互作用原子的玻色-爱因斯坦凝聚体(BEC)性质的限制.原子-原子相互作用产生了一个(规范不变性)的破缺项,以相容性但书的形式对玻色-爱因斯坦凝聚作了进一步的限制。在所有情况下,D </-2的BEC存在的必要条件是宏观上占据许多单粒子动量态,原点是凝聚的极限点(或聚点)。结果表明,无序势中非相互作用原子的玻色-爱因斯坦凝聚的性质与无外势时相互作用原子的玻色-爱因斯坦凝聚的性质完全相同。

英文摘要:

We consider the restriction placed by the Bogoliubov inequality on the nature of the Bose-Einstein condensates (BECs) for interacting atoms in a spatial dimension D </- 2 and in the presence of an external arbitrary potential, which may be a confining "box", a periodic, or a disordered potential. The atom-atom interaction gives rise to a (gauge invariance) symmetry-breaking term that places further restrictions on BECs in the form of a consistency proviso. The necessary condition for the existence of a BEC in D </- 2 in all cases is macroscopic occupation of many single-particle momenta states with the origin a limit point (or accumulation point) of condensates. It is shown that the nature of BECs for noninteracting atoms in a disordered potential is precisely the same as that of BECs for interacting atoms in the absence of an external potential.

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