Dynamic analysis of the two-level system photon echo in the dressed state representation
ZHANG Yan-li1,2, QIU Xu1, LI Yong-fang1*
(1 College of Physics and Information Technology, Shaanxi Normal University, Shaanxi Normal University, Xi′an 710062, Shaanxi, China;2 Department of Information Material Science and Engineering，Guilin University of Electronic Technology，Guilin 541004, Guangxi, China)
Abstract:
Using the method of the Bloch vectors, the physics mechanism of the photon echo is analyzed with both the dressed state and quantum interference theory, and the physics picture for the interaction between light and atoms is given in detail. The dynamic process for the quantum information storage and that of the recall with the photon echo is discussed under adiabatic condition. The results show that the photon information is stored in the medium during the first pulse, and when v and w of the Bloch vectors are inversed during the second pulse, the information reappears as the photon echo. The process of the photon echo is virtually the process of photon information storage and recall.
KeyWords:
dressed state theory; adiabatic condition; Bloch vectors
