发表机构
University College London; Ningbo University; Tianjin University; Northwest University; Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas（伦敦大学学院; 宁波大学; 天津大学; 西北大学; 马德里材料科学研究所，西班牙国家研究委员会）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过对比单键与交替扰动，发现相干失配架构以更小振幅驱动U(1)对称XXZ Floquet电路向混沌交叉，且响应受键位置影响，揭示空间干涉重塑本征态耦合。
AI 中文摘要
我们研究了确定性相干门扰动的空间轮廓如何影响U(1)对称XXZ Floquet电路中的有限尺寸准能量统计和算子动力学。利用共享的均匀参考，我们将单个修改键与应用于整个链的交替扰动进行比较。在分离对称扇区并检查几种已知的可积形式后，我们发现交替电路以比单个缺陷更小的局部振幅趋向于圆形正交系综能级统计，并改变算子空间纠缠和离时序关联。对于中等数量的修改键，响应是非单调的，并且还取决于键的放置位置，因此仅键密度是不够的。微扰分析识别出多个修改键的加性权重，而相干空间干涉重塑了邻近本征态之间的耦合。
英文摘要
We study how the spatial profile of a deterministic coherent gate perturbation affects finite-size quasienergy statistics and operator dynamics in U(1)-symmetric XXZ Floquet circuits. Using a shared homogeneous reference, we compare a single modified bond with an alternating perturbation applied across the whole chain. After separating symmetry sectors and checking several known integrable forms, we find that the alternating circuits move toward circular orthogonal ensemble level statistics and change operator-space entanglement and out-of-time-order correlations at smaller local amplitudes than the single defects. For intermediate numbers of modified bonds, the response is nonmonotonic and also depends on where the bonds are placed, so bond density alone is not enough. A perturbative analysis identifies the additive weight of many modified bonds, while coherent spatial interference reshapes the coupling between nearby eigenstates.
Comments28 pages, 8 figures, 10 supporting figures
