Quantum demixing in binary mixtures of dipolar bosons
Quantum demixing in binary mixtures of dipolar bosons
复制标题
偶极玻色子二元混合物中的量子分层
DOI：
10.1103/physreva.83.023602
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发表时间：
2010
影响因子：
2.9
通讯作者：
M. Boninsegni
中科院分区：
文献类型：
--
作者：
P. Jain;M. Boninsegni
量子Monte Carlo模拟的两个组件玻色混合物被困的偶极原子相同的质量和偶极矩，提供了在有限的低温下的分层的数值证据。分相是量子统计的结果，它导致了类似玻色子之间的有效吸引。两个组分的空间分离发生在低温下，伴随着相同粒子的长时间交换，这是两个组分的玻色-爱因斯坦凝聚的基础。相反，在较高温度下，由于混合熵，系统是可混溶的。交换也被发现，以提高分层的情况下，不同的和可区分的物种的混合物。
Quantum Monte Carlo simulations of a two-component Bose mixture of trapped dipolar atoms of identical masses and dipole moments, provide numerical evidence of demixing at low finite temperatures. Demixing occurs as a consequence of quantum statistics, which results in an effective attraction between like bosons. Spatial separation of two components takes place at low temperature with the onset of long exchanges of identical particles, underlying Bose-Einstein condensation of both components. Conversely, at higher temperature the system is miscible due to the entropy of mixing. Exchanges are also found to enhance demixing in the case of mixtures of nonidentical and distinguishable species.