Open AccessQuantum discord in the system of two atoms trapped in weak coherent state cavities connected by an optical fiber
Author(s) -
卢道明,
邱昌东
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.110303
Subject(s) - physics , atom (system on chip) , coupling constant , field (mathematics) , coupling (piping) , quantum , fiber , optical fiber , atomic physics , optics , quantum mechanics , materials science , computer science , composite material , mathematics , pure mathematics , metallurgy , embedded system
Geometrical quantum discord (GQD) is an effective measure of quantum correlation in quantum systems. We study GQD dynamics in an atom-cavity-fiber system. GQD between atoms and that between cavities are investigated. The influences of coupling constant between cavity and fiber and the intensity of the cavity field on GQD are discussed. Results show that GQD between atoms and that between cavities all display periodical evolutions, and their evolution frequencies increase with increasing coupling constant between cavity and fiber. On the other hand, the GQD between atoms and that between cavities are all strengthened with increasing intensity of the cavity field.