期刊文献+

Partial entropy change and entanglement in the mixed state for a Jaynes-Cummings model with Kerr medium

Partial entropy change and entanglement in the mixed state for a Jaynes-Cummings model with Kerr medium
下载PDF
导出
摘要 By using the algebraic dynamical approach, an atom--field bipartite system in mixed state is employed to investigate the partial entropy change and the entanglement in a cavity filled with Kerr medium. The effects of different nonlinear intensities are studied. One can find that the Kerr nonlinearity can reduce the fluctuation amplitudes of the partial entropy changes and the entanglement of the two subsystems, and also influence their periodic evolution. Meanwhile, increasing the Kerr nonlinear strength can convert the anti-correlated behaviour of the partial entropy change to the positively correlated behaviour. Furthermore, the entanglement greatly depends on the temperature. When the temperature or the nonlinear intensity increases to a certain value, the entanglement can be suppressed greatly. By using the algebraic dynamical approach, an atom--field bipartite system in mixed state is employed to investigate the partial entropy change and the entanglement in a cavity filled with Kerr medium. The effects of different nonlinear intensities are studied. One can find that the Kerr nonlinearity can reduce the fluctuation amplitudes of the partial entropy changes and the entanglement of the two subsystems, and also influence their periodic evolution. Meanwhile, increasing the Kerr nonlinear strength can convert the anti-correlated behaviour of the partial entropy change to the positively correlated behaviour. Furthermore, the entanglement greatly depends on the temperature. When the temperature or the nonlinear intensity increases to a certain value, the entanglement can be suppressed greatly.
出处 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第2期303-311,共9页 中国物理B(英文版)
基金 supported by the National Natural Science Foundation of China (Grant No. 10704031) the National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China (Grant No. J0630313) the Fundamental Research Fund for Physics and Mathematics of Lanzhou University (Grant No. Lzu05001) the Natural Science Foundation of Gansu Province, China (Grant No. 3ZS061-A25-035)
关键词 ENTANGLEMENT algebraic dynamical method Jaynes--Cummings model Kerr medium entanglement algebraic dynamical method Jaynes--Cummings model Kerr medium
  • 引文网络
  • 相关文献

参考文献35

  • 1Schumacher B and Westmoreland M 1997 Phys. Rev. A 56 131.
  • 2Majumdar K 2009 Phys. Rev. B 79 115134.
  • 3Osenda O and Serra P 2007 Phys. Rev. A 75 042331.
  • 4Carvalho Andre R R, Mintert F and Buchleitner A 2004 Phys. Rev. Left. 93 230501.
  • 5Yu C S, Yi X X and Song H S 2008 Phys. Rev. A 78 062330.
  • 6Angelo R M, Vitiello S A, De Aguiar M A M and Furuya K 2004 Physica A 338 458.
  • 7Li Z G, Fei S M, Wang Z D and Liu W M 2009 Phys. Rev. A 79 024303.
  • 8Bellomo B, Franco R L and Compagno G 2008 Phys. Rev. A 78 062309.
  • 9Yu T and Eberly J H 2006 Phys. Rev. Lett. 97 140403.
  • 10Bennett C H, DiVincenzo D P, Smolin J A and Wootters W K 1996 Phys. Rew A 54 3824.
;
使用帮助 返回顶部