Open AccessThe influence of Kerr medium on the intrinsic decoherence under the condition of existence of dipole-dipole interaction
Author(s) -
Qi Lin-Na,
Shou Zhang
Publication year - 2009
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.58.4630
Subject(s) - concurrence , quantum decoherence , quantum entanglement , physics , dipole , nonlinear system , atom (system on chip) , quantum mechanics , coupling (piping) , coupling constant , quantum electrodynamics , condensed matter physics , quantum , materials science , computer science , metallurgy , embedded system
We investigate the influence of Kerr medium on the concurrence of the two-atom system under the condition of existence of dipole-dipole interaction. The entanglement of the system is calculated by making use of concurrence. We discuss the variation of the concurrence with time. The result shows that the appropriate choice for the nonlinear coupling constant χ of Kerr medium can improve the concurrence of the system and restrain effectively the intrinsic decoherence of the system. We also find that with respect to increasing concurrence, the multiple Λ may take different values as Ω varyies.