非线性Chern系统中的手征边缘孤子
Chiral edge soliton in nonlinear Chern systems
摘要：
我们研究了在具有两个手征相反的手征边缘态的Chern绝缘体中引入非线性效应对手征边缘态的影响。我们探索了淬火动力学的一个站点上的一个边缘，并分析了一个波包的时间演化的脉冲。在没有非线性的情况下，初始脉冲对称地扩展和扩散。另一方面，当存在非线性项时，由于非线性项的自陷效应形成孤波，孤波沿边缘单向传播，我们称之为手征边缘孤波。进一步增加的非线性诱导自陷跃迁，其中手征波包停止其运动。有趣的是，非线性仅通过改变初始条件而不改变样品来控制。
英文摘要：
We study the effect on the chiral edge states by including a nonlinearity to a Chern insulator which has two chiral edge states with opposite chiralities. We explore a quench dynamics by giving a pulse to one site on an edge and analyzing the time evolution of a wave packet. Without the nonlinearity, an initial pulse spreads symmetrically and diffuses. On the other hand, with the nonlinearity present, a solitary wave is formed by the self-trapping effect of the nonlinear term and undergoes a unidirectional propagation along the edge, which we identify as a chiral edge soliton. A further increase of the nonlinearity induces a self-trapping transition, where the chiral wave packet stops its motion. It is intriguing that the nonlinearity is controlled only by changing the initial condition without changing a sample.
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。
