Gaussian entanglement induced by an extended thermal environment
Abstract
We study stationary entanglement among three harmonic oscillators which are dipole coupled to a one-dimensional or a three-dimensional bosonic environment. The analysis of the open-system dynamics is performed with generalized quantum Langevin equations which we solve exactly in Fourier representation. The focus lies on Gaussian bipartite and tripartite entanglement induced by the highly non-Markovian interaction mediated by the environment. This environment-induced interaction represents an effective many-parties interaction with a spatial long-range feature: a main finding is that the presence of a passive oscillator is detrimental for the stationary two-mode entanglement. Furthermore, our results strongly indicate that the environment-induced entanglement mechanism corresponds to uncontrolled feedback which is predominantly coherent at low temperatures and for moderate oscillator-environment coupling as compared to the oscillator frequency.
Keywords
Cite
@article{arxiv.1307.4571,
title = {Gaussian entanglement induced by an extended thermal environment},
author = {Antonio A. Valido and Daniel Alonso and Sigmund Kohler},
journal= {arXiv preprint arXiv:1307.4571},
year = {2013}
}
Comments
15 page, 6 figures