Control of a single-particle localization in open quantum systems
Abstract
We investigate the possibility to control localization properties of the asymptotic state of an open quantum system with a tunable synthetic dissipation. The control mechanism relies on the matching between properties of dissipative operators, acting on neighboring sites and specified by a single control parameter, and the spatial phase structure of eigenstates of the system Hamiltonian. As a result, the latter coincide (or near coincide) with the dark states of the operators. In a disorder-free Hamiltonian with a flat band, one can either obtain a localized asymptotic state or populate whole flat and/or dispersive bands, depending on the value of the control parameter. In a disordered Anderson system, the asymptotic state can be localized anywhere in the spectrum of the Hamiltonian. The dissipative control is robust with respect to an additional local dephasing.
Cite
@article{arxiv.1709.03444,
title = {Control of a single-particle localization in open quantum systems},
author = {O. S. Vershinina and I. I. Yusipov and S. Denisov and M. V. Ivanchenko and T. V. Laptyeva},
journal= {arXiv preprint arXiv:1709.03444},
year = {2017}
}
Comments
6 pages, 5 figures