Quantum quenches in the thermodynamic limit. II. Initial ground states.
Quantum quenches in the thermodynamic limit. II. Initial ground states.
复制标题
量子在热力学极限内淬灭。
DOI：
10.1103/physreve.90.031301
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Rigol
中科院分区：
文献类型：
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作者：
M. Rigol
最近引入了一种数值链簇算法来研究热力学极限下从热初态出发的量子猝灭[M。Rigol，Phys. Rev. Lett. 112，170601（2014）]。在这里，我们定制该算法从基态开始淬灭。特别地，我们研究了从反铁磁伊辛模型的基态到XXZ链的猝灭。我们的自旋关联的结果显示出与最近的分析计算的基础上的淬火行动的方法是非常一致的。我们还表明，它们是不同的热平衡，这证实了热化一般不会发生在可积模型，即使它们不能映射到非相互作用的相关。
A numerical linked-cluster algorithm was recently introduced to study quantum quenches in the thermodynamic limit starting from thermal initial states [M. Rigol, Phys. Rev. Lett. 112, 170601 (2014)]. Here, we tailor that algorithm to quenches starting from ground states. In particular, we study quenches from the ground state of the antiferromagnetic Ising model to the XXZ chain. Our results for spin correlations are shown to be in excellent agreement with recent analytical calculations based on the quench action method. We also show that they are different from the correlations in thermal equilibrium, which confirms the expectation that thermalization does not occur in general in integrable models even if they cannot be mapped to noninteracting ones.