Few-boson tunneling dynamics of strongly correlated binary mixtures in a double well
Few-boson tunneling dynamics of strongly correlated binary mixtures in a double well
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DOI：
10.1103/physreva.85.013611
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发表时间：
2011-05
影响因子：
2.9
通讯作者：
B. Chatterjee;I. Brouzos;Lushuai Cao;P. Schmelcher
中科院分区：
文献类型：
--
作者：
B. Chatterjee;I. Brouzos;Lushuai Cao;P. Schmelcher
我们研究了一维双势阱中强关联玻色混合物的隧穿动力学。使用数值精确的多组态含时Hartree（MCTDH）方法研究了种间和种内相互作用及其相互作用的作用。动力学研究了三种初始配置：完全和部分人口不平衡和相位分离状态。增加物种间的相互作用导致隧道时间周期的强烈增加，类似于凝聚体的量子自陷。种内排斥可以抑制或增强隧穿周期，这取决于种间关联的强度以及初始构型。揭示了两个物种之间和同一物种内部完全相关的隧道效应以及物种分离和逆流的机制。通过研究多体能谱以及贡献定态的性质解释了这些效应。
We explore the tunneling dynamics of strongly correlated bosonic mixtures in a one-dimensional double-well. The role of the inter- and intra-species interactions and their interplay is investigated using the numerically exact Multi-Configuration Time dependent Hartree (MCTDH) method. The dynamics is studied for three initial configurations: complete and partial population imbalance and a phase separated state. Increasing the inter-species interaction leads to a strong increase of the tunneling time period analogous to the quantum self-trapping for condensates. The intra-species repulsion can suppress or enhance the tunneling period depending on the strength of the inter-species correlations as well as the initial configuration. Completely correlated tunneling between the two species and within the same species as well as mechanisms of species separation and counterflow are revealed. These effects are explained by studying the many-body energy spectra as well as the properties of the contributing stationary states.