%A Liu Tang-Kun, Cheng Wei-Wen, Shan Chuan-Jia, Gao Yun-Feng, Wang Ji-Suo
%T Entanglement properties in a system of a pairwise entangled state
%0 Journal Article
%D 2007
%J Chin. Phys. B
%R 10.1088/1009-1963/16/12/024
%P 3697-3703
%V 16
%N 12
%U {http://cpb.iphy.ac.cn/CN/abstract/article_22205.shtml}
%8 2007-12-20
%X Based on the quantum information theory, this paper has investigated
the entanglement properties of a system which is composed of the two
entangled two-level atoms interacting with the two-mode entangled
coherent fields. The influences of the strength of light field and
the two parameters of entanglement between the two-mode fields on
the field entropy and on the negative eigenvalues of partial
transposition of density matrix are discussed by using numerical
calculations. The result shows that the entanglement properties in a
system of a pairwise entangled states can be controlled by
appropriately choosing the two parameters of entanglement between
the two-mode entangled coherent fields and the strength of two light
fields respectively.