Long-range entanglement in the XXZ Heisenberg spin chain after a local quench

TL;DR

This paper investigates how local quenches in a one-dimensional XXZ spin chain influence the generation and dynamics of long-range entanglement, revealing the roles of anisotropy and local coupling.

Contribution

It demonstrates the generation of long-range entanglement via local quenches and analyzes the effects of anisotropic interactions and local coupling on entanglement dynamics.

Findings

Long-range entanglement can be generated by local quenches.

Anisotropic interactions significantly affect entanglement magnitude and timing.

Local coupling impacts entanglement but not the timing of maximum entanglement.

Abstract

The long-range entanglement dynamics of an one-dimensional spin-1/2 anisotropic XXZ model are studied using the method of the adaptive time-dependent density-matrix renormalization-group. The long-range entanglement can be generated when a local quench on one of boundary bonds is performed in the system. The anisotropic interaction has a strong influence both on the maximal value of long-range entanglement and the time of reaching the maximum long-range entanglement. The local coupling has a notable impact on the long-range entanglement, but it can be neglected in the time of reaching the maximal long-range entanglement.