Strongly correlated fermions after a quantum quench
Strongly correlated fermions after a quantum quench
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DOI：
10.1103/physrevlett.98.210405
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发表时间：
2007-05-25
影响因子：
8.6
通讯作者：
Muramatsu, A.
中科院分区：
文献类型：
--
作者：
Manmana, S. R.;Wessel, S.;Muramatsu, A.
利用自适应含时密度矩阵重整化群方法，研究了一维晶格上强关联无自旋费米子在相互作用强度突变后的时间演化.对于某些参数值，两个不同的初始状态（例如，金属的和绝缘的）导致在弛豫之后变得不可区分的可观察量。我们发现由此产生的准稳态是非热的。这个结果适用于系统的可积和不可积变体。
Using the adaptive time-dependent density-matrix renormalization group method, we study the time evolution of strongly correlated spinless fermions on a one-dimensional lattice after a sudden change of the interaction strength. For certain parameter values, two different initial states (e.g., metallic and insulating) lead to observables which become indistinguishable after relaxation. We find that the resulting quasistationary state is nonthermal. This result holds for both integrable and nonintegrable variants of the system.