论文标题
Schwinger模型中的弱点破裂
Weak Ergodicity Breaking in the Schwinger Model
论文作者
论文摘要
作为无序的不可融合模型中弱的恐怖性破坏的范式，量子多体疤痕（QMB）可以深入了解仪表理论的热化动力学。首先是在Schwinger模型的旋转$ 1/2 $量子链接公式中发现的，这是一个基本问题，即QMBS持续$ s> 1/2 $是否持续使用，因为此类理论会汇集到lattice Schwinger模型中，这是一个空间上的lattice Qed的适当版本。在这项工作中，我们通过探索spin- $ s $ $ \ mathrm {u}（1）$ Quantum链接模型（QLMS）中的QMB来解决这个问题。我们发现QMB持续$ s> 1/2 $，具有共振的疤痕状态，这是由零质量淬火发生的，这是由简单的高能量仪表不变的初始状态引起的。我们此外，我们发现了疤痕状态失调的证据，这些证据是从物理真空和收费增殖状态开始的有限质量淬火发生的。我们的结果最终表明，QMB存在于一个空间维度中，以旋转为$ s $ qLMS代表与动态费米子的旋转尺寸表示。
As a paradigm of weak ergodicity breaking in disorder-free nonintegrable models, quantum many-body scars (QMBS) can offer deep insights into the thermalization dynamics of gauge theories. Having been first discovered in a spin-$1/2$ quantum link formulation of the Schwinger model, it is a fundamental question as to whether QMBS persist for $S>1/2$ since such theories converge to the lattice Schwinger model in the large-$S$ limit, which is the appropriate version of lattice QED in one spatial dimension. In this work, we address this question by exploring QMBS in spin-$S$ $\mathrm{U}(1)$ quantum link models (QLMs) with staggered fermions. We find that QMBS persist at $S>1/2$, with the resonant scarring regime, which occurs for a zero-mass quench, arising from simple high-energy gauge-invariant initial states. We furthermore find evidence of detuned scarring regimes, which occur for finite-mass quenches starting in the physical vacua and the charge-proliferated state. Our results conclusively show that QMBS exist in a wide class of lattice gauge theories in one spatial dimension represented by spin-$S$ QLMs coupled to dynamical fermions.
