Stable-unstable transition for a Bose-Hubbard chain coupled to an environment
Stable-unstable transition for a Bose-Hubbard chain coupled to an environment
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DOI：
10.1103/physreva.97.053610
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发表时间：
2017-08
影响因子：
2.9
通讯作者：
Chu Guo;I. D. Vega;U. Schollwock;D. Poletti
中科院分区：
文献类型：
--
作者：
Chu Guo;I. D. Vega;U. Schollwock;D. Poletti
量子系统中的相互作用可能会引起物质的奇异相关相的转变，这些相可能容易耦合到环境中。在这里，我们研究了耦合到玻色子浴在零和非零温度下的玻色-哈伯德链的稳定性。我们发现，只有在一个临界相互作用链失去玻色子和它的属性受到显着影响。这种转变与超流-莫特-绝缘体转变的性质不同，并且发生在不同的临界相互作用下。我们解释了这样一个稳定的不稳定的转变，通过开放的全球电荷间隙。准确的矩阵产物状态模拟与错过这种转变的近似方法的比较揭示了它的多体起源。
Interactions in quantum systems may induce transitions to exotic correlated phases of matter which can be vulnerable to coupling to an environment. Here, we study the stability of a Bose-Hubbard chain coupled to a bosonic bath at zero and nonzero temperature. We show that only above a critical interaction the chain loses bosons and its properties are significantly affected. The transition is of a different nature than the superfluid-Mott-insulator transition and occurs at a different critical interaction. We explain such a stable-unstable transition by the opening of a global charge gap. The comparison of accurate matrix product state simulations to approximative approaches that miss this transition reveals its many-body origin.