Influence of an External Classical Field on a ♢ Four-Level Atom Inside a Quantized Field

Symmetry

Eied Mahmoud Khalil¹  Hanaa Abu-Zinadah²  Mahmoud Youssef Abd-Rabbou³ 

[1] Department of Mathematics, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia;Department of Statistics, College of Science, University of Jeddah, Jeddah 23218, Saudi Arabia;Mathematics Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, Egypt;

关键词: four-level atom;    external classical field;    mixedness;    coherence;   

DOI  :  10.3390/sym14040811

来源: DOAJ

【 摘 要 】

In this paper, we study the effect of detuning parameters and driven external classical field parameters on a quantum system consisting of a ♢-configuration four-level atom inside a quantized cavity field. Under some canonical conditional of dressed states, the exact solution of the Schrödinger equation is obtained. The occupation of atomic levels and statistical population inversion is studied. Our results show that the classical field parameter dissolved the collapse periods and increased the maximum bounds of the upper state, while decreasing the lower bounds of the lower state. The detuning parameters reduce the minimum bounds of atomic levels and their inversion. On the other hand, the linear entropy and $l_1$ norm of coherence are employed to measure the temporal evolution of the mixedness and coherence. It is found that the driven classical field improves the temporal evolution of the mixedness and lower bounds of coherence. However, the detuning parameters have a destructive effect on the mixedness and lower bounds of coherence. The intensity of the external classical field is regarded as a control parameter with different values of detuning parameters.

【 授权许可】

Unknown