Nonclassical effects for a qubit coupled to a coherent two-mode cavity with intrinsic decoherence

Results in Physics

卷:19

A.-S. F. Obada¹  E.M. Khalil²  A.-B.A. Mohamed³  H. Eleuch⁴ 

[1] Corresponding author.;

[2] Mathematics Department, Faculty of Science, Assiut University, Assiut, Egypt;

[3] Department of Mathematics, College of Science and Humanities in Al-Aflaj, Prince Sattam bin Abdulaziz University, Saudi Arabia;

[4] Mathematics Department, College of Science, Taif University, Taif 888, Saudi Arabia;

关键词: Intrinsic decoherence;    Two modes;    Liner entropy;    Negativity;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this paper, we use the su(1,1)-algebraic treatment to explore the effects of the intrinsic decoherence in a two-mode cavity containing a two-level atom. Each field is resonant with the qubit through a four-photon process. The role of the intrinsic decoherence and the superposition of the initial generalized Barut-Girardello coherent state on the quantum effects is investigated via different quantifiers as: atomic inversion, linear entropy and negativity. It is found that the non-linearity of the four-photon process leads to generate non-classical effects with a high oscillatory behavior. The superposition of the Barut-Girardello coherent state controls the dynamics of the purity loss and the entanglement. It is found that the nonclassical effects are very sensitive to the nonlinear interactions between the qubit and the two-mode cavity.

【 授权许可】

Unknown