发表机构
Izmir Institute of Technology（伊兹密尔理工大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究边界驱动且各格点耦合局部退相浴的一维费米-哈伯德链稳态输运，用TEBD方法求解，发现退相诱导两种输运增强机制，揭示多体关联对相干驱动等物理量相互作用的塑造。
AI 中文摘要
我们研究一维费米-哈伯德链的稳态输运，该链在边界处与粒子库耦合，在每个格点处与局部退相浴耦合，采用时间演化块抽取（TEBD）方法求解林德布拉德主方程。在无退相时，电流随边界驱动速率变化呈现两个分离良好的峰值，反映强关联区域中不同的电荷和自旋能标。引入退相后，我们发现两种不同的退相诱导输运增强机制，这与无自旋费米子此前报道的单一增强机制形成对比。对哈密顿量本征基中非平衡稳态的分析表明，这两种机制源于不同的退相诱导再分布过程：第一种涉及最上层哈伯德带内的再分布，第二种涉及哈伯德带之间的跃迁。我们的结果表明，多体关联如何塑造强关联开放系统中相干驱动、退相与量子芝诺物理之间的相互作用。
英文摘要
We study steady-state transport in a one-dimensional Fermi-Hubbard chain coupled to particle reservoirs at the boundaries and to local dephasing baths at each site, using the time-evolving block decimation (TEBD) method to solve the Lindblad master equation. In the absence of dephasing, the current exhibits two well-separated maxima as a function of the boundary driving rate, reflecting the distinct charge and spin energy scales of the strongly correlated regime. Upon introducing dephasing, we find two distinct dephasing-induced transport-enhancement regimes, in contrast to the single enhancement previously reported for spinless fermions. Analysis of the non-equilibrium steady state in the Hamiltonian eigenbasis reveals that the two regimes originate from distinct dephasing-induced redistribution processes: the first involves redistribution within the uppermost Hubbard band, while the second involves transitions between Hubbard bands. Our results demonstrate how many-body correlations shape the interplay between coherent driving, dephasing, and quantum Zeno physics in strongly correlated open systems.
Comments23 pages, 7 figures
