Quantum discord amplification induced by quantum phase transition via a cavity-Bose-Einstein-condensate system
Quantum Physics
2013-03-14 v1
Abstract
We propose a theoretical scheme to realize a sensitive amplification of quantum discord (QD) between two atomic qubits via a cavity-Bose-Einstein condensate (BEC) system which was used to firstly realize the Dicke quantum phase transition (QPT) [Nature 464, 1301 (2010)]. It is shown that the influence of the cavity-BEC system upon the two qubits is equivalent to a phase decoherence environment. It is found that QPT in the cavity-BEC system is the physical mechanism of the sensitive QD amplification.
Cite
@article{arxiv.1208.2776,
title = {Quantum discord amplification induced by quantum phase transition via a cavity-Bose-Einstein-condensate system},
author = {Ji-Bing Yuan and Le-Man Kuang},
journal= {arXiv preprint arXiv:1208.2776},
year = {2013}
}
Comments
5 pages, 3 figures