Emergence of coherence in the Mott-insulator-superfluid quench of the Bose-Hubbard model
Emergence of coherence in the Mott-insulator-superfluid quench of the Bose-Hubbard model
复制标题
Bose-Hubbard 模型莫特绝缘体超流体猝灭中相干性的出现
DOI：
10.1103/physreva.82.063603
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发表时间：
2010
影响因子：
2.9
通讯作者：
R. Schützhold
中科院分区：
文献类型：
--
作者：
P. Navez;R. Schützhold
我们研究了玻色-哈伯德模型中从Mott绝缘体到超流相的猝灭过程，并研究了相位相干性的时空增长，即初始不相关位置之间的相位锁定。为此，我们通过受控扩展到配位数的逆幂来建立相关性层次结构。事实证明，非对角长程有序以恒定的传播速度传播，形成局部凝聚补丁，而相位相关器遵循扩散增长率。
We study the quench from the Mott-insulator to the superfluid phase in the Bose-Hubbard model and investigate the spatial-temporal growth of phase coherence, that is, phase locking between initially uncorrelated sites. To this end, we establish a hierarchy of correlations via a controlled expansion into inverse powers of the coordination number. It turns out that the off-diagonal long-range order spreads with a constant propagation speed, forming local condensate patches, whereas the phase correlator follows a diffusionlike growth rate.