Effective protection of quantum coherence by non-Hermitian driving
Abstract
In this letter, we investigate the effects of non-Hermitian driving on quantum coherence in a bipartite system. The results that the dynamical localization destroyed by the Hermitian interaction revives are an evidence of the restoration of quantum coherence by non-Hermitian driving. Besides, the entanglement between the two subsystems also decays with the boosting of non-hermitian driving strength, which provides another evidence that non-Hermitian driving will protect quantum coherence. The physics behind this phenomenon is the domination of the quasieigenstate with maximum imaginary value of the quasieigenvalue on the dynamics of the non-Hermitian system. Our discovery establishes a restoration mechanism of quantum coherence in interacting and dissipative quantum systems, which is highly relevant to experiments in diverse fields from many-body physics to quantum information.
Keywords
Cite
@article{arxiv.2103.11496,
title = {Effective protection of quantum coherence by non-Hermitian driving},
author = {Kai-Qian Huang and Wen-Lei Zhao and Zhi Li},
journal= {arXiv preprint arXiv:2103.11496},
year = {2021}
}
Comments
6 pages, 3 figures