论文标题
Rydberg原子阵列中量子自旋液体的动态制备
Dynamical preparation of quantum spin liquids in Rydberg atom arrays
论文作者
论文摘要
我们理论上分析了最近的实验[G. Semeghini等人，Science 374，1242（2021）]使用基于Rydberg Atom阵列的可编程量子模拟器来证明拓扑自旋液体的发作。在实验中，使用准绝热状态制备方案制备的拓扑顺序的强大特征出现。从理论上讲，我们可以优化状态制备方案，以针对拓扑阶段的固定点 - 硬二聚体的共鸣价键（RVB） - 在与原子数线性缩放的时间内。此外，我们提供了张量网络（TN）的两参数变分歧管，该变异歧管准确地描述了制备过程的多体动力学。使用这种方法，我们分析了非平衡状态的性质，建立了拓扑顺序的出现。
We theoretically analyze recent experiments [G. Semeghini et al., Science 374, 1242 (2021)] demonstrating the onset of a topological spin liquid using a programmable quantum simulator based on Rydberg atom arrays. In the experiment, robust signatures of topological order emerge in out-of-equilibrium states that are prepared using a quasi-adiabatic state preparation protocol. We show theoretically that the state preparation protocol can be optimized to target the fixed point of the topological phase -- the resonating valence bond (RVB) state of hard dimers -- in a time that scales linearly with the number of atoms. Moreover, we provide a two-parameter variational manifold of tensor network (TN) states that accurately describe the many-body dynamics of the preparation process. Using this approach we analyze the nature of the non-equilibrium state, establishing the emergence of topological order.
