Controlling quantum coherence of a two-component Bose-Einstein condensate via an impurity atom
Abstract
We propose a scheme to control quantum coherence of a two-component Bose-Einstein condensate (BEC) by a single impurity atom immersed in the BEC. We show that the single impurity atom can act as a single atom valve (SAV) to control quantum coherence of the two-component BEC. It is demonstrated that the SAV can realize the on-demand control over quantum coherence at an arbitrary time. Specially, it is found that the SAV can also control higher-order quantum coherence of two-component BEC. We investigate the long-time evolution of quantum coherence of the two-component BEC. It is indicated that the single impurity atom can induce collapse and revival phenomenon of quantum coherence of the two-component BEC. Collapse-revival configurations of quantum coherence can be manipulated by the initial-state parameters of the impurity atom and the impurity-BEC interaction strengths.
Keywords
Cite
@article{arxiv.1909.03374,
title = {Controlling quantum coherence of a two-component Bose-Einstein condensate via an impurity atom},
author = {Zhen Li and Le-Man Kuang},
journal= {arXiv preprint arXiv:1909.03374},
year = {2019}
}