发表机构
Fukuoka Institute of Technology; Zhejiang University(福冈工业大学; 浙江大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文以横场伊辛链模型为平台,构建非平衡量子态的信息几何框架,研究混合度量分量$g_{ht}$等几何可观测量,分析其与纠缠熵、Loschmidt回波的关联,为非平衡量子态表征提供几何视角。
AI 中文摘要
本文讨论用于表征非平衡动力学中量子态的信息几何框架。以横场伊辛链模型为研究平台,我们重点研究混合度量分量$g_{ht}$及相关几何可观测量的量子费舍尔信息度量,其中$h$是淬火后可控的哈密顿量参数,$t$是实时。该框架将$h$和$t$视为扩展信息流形$(h,t)$的坐标。几何可观测量表征流形上的演化速度,以及时间方向与参数形变方向的对齐程度。我们分析了这些几何量与两种广泛使用的非平衡动力学度量(纠缠熵和Loschmidt回波)之间的关联。
英文摘要
We discuss an information-geometric framework for characterizing quantum states in non-equilibrium dynamics. Using the transverse-field Ising chain model as a laboratory, we investigate the quantum Fisher information metric with particular emphasis on the mixed metric component $g_{ht}$ and related geometric observables, where $h$ is a controllable post-quench Hamiltonian parameter and $t$ is real time. The framework treats $h$ and $t$ as coordinates of an extended information manifold $(h,t)$. The geometric observables characterize the speed of evolution on the manifold and the alignment between the temporal and parameter-deformation directions. Correlations between these geometric quantities and two widely used measures of non-equilibrium dynamics, the entanglement entropy and the Loschmidt echo, are analyzed.
Comments13 pages, 13 figures