发表机构
School of Physics and Optoelectronic Engineering, Foshan University（佛山大学物理与光电工程学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究二聚化各向异性Gamma相互作用的Ising链，发现Gamma各向异性与横向场竞争产生矢量手性序和动力学量子相变，并揭示无能隙临界线及淬灭路径依赖的临界时间序列。
AI 中文摘要
我们研究了一个具有二聚化各向异性Gamma相互作用的横向场Ising链，并证明在存在和不存在Ising相互作用的情况下，Gamma各向异性与横向场之间的竞争都会产生矢量手性序和动力学量子相变。相图包括正、负矢量手性相和顺磁相，其特征由矢量自旋手性和矢量手性序参量描述。在不存在Ising相互作用时，我们识别出一条无有限尺寸漂移的无能隙临界线，沿该线的自旋-自旋关联和子系统纠缠熵表现出与Ising临界性不同的行为。此外，我们发现动力学量子相变的临界时间形成周期或非周期序列，这取决于淬灭路径。我们的发现强调了二聚化非对角交换如何丰富量子Ising链中的平衡序和动力学临界行为。
英文摘要
We investigate a transverse-field Ising chain with dimerized anisotropic Gamma interactions and demonstrate that, both in the absence and presence of Ising interactions, the competition between Gamma anisotropy and the transverse field gives rise to vector chiral order and dynamical quantum phase transitions. The phase diagram comprises positive and negative vector chiral phases and a paramagnetic phase, characterized by the vector spin chirality and the vector chiral order parameter. In the absence of Ising interactions, we identify a gapless critical line that exhibits no finite-size drift, along which the spin-spin correlations and subsystem entanglement entropy display behavior distinct from that of Ising criticality. Furthermore, we find that the critical times of dynamical quantum phase transitions form periodic or aperiodic sequences, depending on the quench path. Our findings highlight how dimerized off-diagonal exchange enriches both equilibrium ordering and dynamical critical behavior in a quantum Ising chain.
Comments10 pages, 6 figures
