Open AccessThe relation between the entanglement of two atoms and the entanglement of two-mode fields
Author(s) -
Heng-Na Xiong,
Hong Guo,
Jiang Jian,
Jun Chen,
Li-Yan Tang
Publication year - 2006
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.55.2720
Subject(s) - quantum entanglement , concurrence , physics , negativity effect , quantum mechanics , swap (finance) , qubit , multipartite entanglement , coincidence counting , mode (computer interface) , squashed entanglement , statistical physics , quantum , computer science , psychology , social psychology , finance , economics , operating system
By means of negativity and concurrence, we investigate the time evolution of the entanglement of the two atoms and the entanglement between the two modes in the system of two atoms interacting with two-mode fields. We find the two entanglements can swap with each other, and they have a very good coincidence relation under certain conditions. In two -qubit system, negativity and concurrence in the same range can keep identical with each other on the standard of the existence of entanglement, but they may not always keep pace with each other for mixed states of the system.