arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1606.06359cond-mat.mes-hallcond-mat.quant-gasquant-ph
收藏

一维拓扑系统的边界诱导动力学及边模记忆效应

Boundary-induced dynamics in 1D topological systems and memory effects of edge modes

Yan He, Chih-Chun Chien

摘要:

在一维Kitaev链和SSH模型中,边界条件的变化引起的动力学行为显示了与拓扑性质相关的速率依赖特征。当边界变化引起的扰动传播到体中时,变换为开边界条件时拓扑边模密度达到稳态。稳态密度依赖于边界的变换率,并作为拓扑系统中的量子记忆效应的一个例证。此外,当边界条件改变时,链路在物理上断开,一些关联函数可以在断开的链路上保持有限,并保持初始条件的记录。通过在两个模型的非拓扑区域中测试这些现象,没有观察到记忆效应的有趣特征。因此,我们的研究结果对比边界诱导动力学的拓扑性质的重要性。

英文摘要:

Dynamics induced by a change of boundary conditions reveals rate-dependent signatures associated with topological properties in one-dimensional Kitaev chain and SSH model. While the perturbation from a change of the boundary propagates into the bulk, the density of topological edge modes in the case of transforming to open boundary condition reaches steady states. The steady-state density depends on the transformation rate of the boundary and serves as an illustration of quantum memory effects in topological systems. Moreover, while a link is physically broken as the boundary condition changes, some correlation functions can remain finite across the broken link and keep a record of the initial condition. By testing those phenomena in the non-topological regimes of the two models, none of the interesting signatures of memory effects can be observed. Our results thus contrast the importance of topological properties in boundary-induced dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑