论文标题
在动力学约束的Rydberg旋转晶格中的新兴Bloch振荡
Emergent Bloch oscillations in a kinetically constrained Rydberg spin lattice
论文作者
论文摘要
我们探讨了动力学约束旋转系统的基本自旋簇的松弛动力学。受Rydberg晶格气体的实验的启发，我们专注于激发旋转导致相邻自旋的“促进”激发的情况。我们表明，即使超出最近邻居的弱相互作用也会对放松行为产生巨大影响：它们产生线性电位，在某些条件下，这会导致自旋簇的Bloch振荡开始。这些阻碍了簇的扩展，更普遍地将多体态的放松朝平衡。这表明，在动力学约束系统中的非癌性行为可能是由于多体态的连通性与弱粒子间相互作用之间的相互作用而发生的。我们此外表明，可以通过测量Rydberg原子密度来检测到此处确定的新出现的BLOCH振荡，并讨论如何使用旋转簇的内部和外部自由度之间的自旋轨道耦合来控制其弛豫行为。
We explore the relaxation dynamics of elementary spin clusters of a kinetically constrained spin system. Inspired by experiments with Rydberg lattice gases, we focus on the situation in which an excited spin leads to a "facilitated" excitation of a neighboring spin. We show that even weak interactions that extend beyond nearest neighbors can have a dramatic impact on the relaxation behavior: they generate a linear potential, which under certain conditions leads to the onset of Bloch oscillations of spin clusters. These hinder the expansion of a cluster and more generally the relaxation of many-body states towards equilibrium. This shows that non-ergodic behavior in kinetically constrained systems may occur as a consequence of the interplay between reduced connectivity of many-body states and weak interparticle interactions. We furthermore show that the emergent Bloch oscillations identified here can be detected in experiment through measurements of the Rydberg atom density, and discuss how spin-orbit coupling between internal and external degrees of freedom of spin clusters can be used to control their relaxation behavior.
