论文标题
二维Rydberg原子阵列中的量子多体疤痕状态
Quantum Many-Body Scar States in Two-Dimensional Rydberg Atom Arrays
论文作者
论文摘要
我们发现，在二维PXP模型中呈指数确切的量子多体疤痕状态 - 在最近的邻居封锁状态下的二维Rydberg原子阵列的有效模型。尽管处于有效的无限温度下，但这种疤痕状态还是非常简单的价键固体，因此强烈违反了本征态热化假设。在特定的边界条件下，此类本征态具有整数值的能量。此外，某些电荷密度的初始状态在量子淬灭和类似塔的结构与本征态重叠后，在Rydberg激发密度中产生强烈的振荡。
We find exponentially many exact quantum many-body scar states in a two-dimensional PXP model -- an effective model for a two-dimensional Rydberg atom array in the nearest-neighbor blockade regime. Such scar states are remarkably simple valence bond solids despite being at effectively infinite temperature, and thus strongly violate the eigenstate thermalization hypothesis. Given a particular boundary condition, such eigenstates have integer-valued energies. Moreover, certain charge-density-wave initial states give rise to strong oscillations in the Rydberg excitation density after a quantum quench and tower-like structures in their overlaps with eigenstates.
