论文标题
在高核玻色子的泵送一维系统中，长寿命的非热状态
Long-lived non-thermal states in pumped one-dimensional systems of hard-core bosons
论文作者
论文摘要
我们研究了在有限的相互作用的硬核玻色子系统中以电荷密度波的形式研究对称性状态的统一时间演变，该系统可以映射到XXZ Heisenberg链上。此外，我们引入了模仿短激光脉冲的空间源和时间依赖性矢量电位。我们建立了可以控制电荷密度波顺序发作的向量电位的幅度范围。我们提出了一种揭示非热寿命状态的协议，该方案的特征是一个非零电荷密度波顺序，由一个晶格位点翻译而成，相对于其初始形成。与系统参数给出的所有典型时间相比，这些状态的寿命很大。它们随着晶格位点的数量而增加，但由于破坏扰动而被显着抑制。鉴于这些发现，我们推测长期的非热状态存在于热力学极限中。
We study a unitary time evolution of a symmetry-broken state in a form of a charge density wave in a finite system of interacting hard-core bosons, which can be mapped onto the XXZ Heisenberg chain. Moreover, we introduce a spatially-homogenous and time-dependent vector potential that mimics a short laser pulse. We establish the range of amplitudes of the vector potential for which the onset of charge density wave order can be controlled. We propose a protocol that reveals non-thermal long-lived states, which are characterized by a non-zero charge density wave order translated by one lattice site with respect to its initial formation. The life times of these states are large in comparison to all typical times given by the parameters of the system. They increase with the number of lattice sites, but are significantly suppressed by the integrablility breaking perturbations. In view of these findings, we speculate that the long-lived non-thermal states exist in the thermodynamic limit.
