The quantum field entropy in the system of a squeezed coherent states field interacting with two coupled two-level atoms
LIU Wang-yun1, YANG Zhi-yong1, AN Yu-ying1, HAN Xiao-wei2
(1 College of Technical Physics, Xidian University, Xi′an 710071, Shaanxi, China; 2 Institute of Quantun Optics and Photonics, Weinan Teachers University, Weinan 714000, Shaanxi, China)
Abstract:
The properties of quantum field entropy evolution in the system of a single-mode squeezed coherent states field interacting with a pair of identical coupled two-level atoms is studied by utilizing of the complete quantum theory, and the influences of the field squeezing parameter, the coupling strength between the field and the atoms and the coupling strength between the two identical two-level atoms on properties of evolution of quantum field entropy are discussed. The results obtained from the numerical results indicate that the field squeezing parameter influences the amplitude of vibration of the field quantum entropy evolution, the coupling strength between the field and the atoms affects the periodicity of the evolution of the field quantum entropy, while the coupling strength between the two identical two-level atoms influences not only the amplitude of the oscillation of the field quantum entropy evolution but also its periodicity.
KeyWords:
quantum optics; quantum information science; single-mode squeezed coherent states; coupled two-atoms with two-level; quantum field entropy
