Open AccessEvolution of atom entropy in a moving cascade three-level atom in a two-photon process
Author(s) -
Jinfang Zhang,
Lei Tan,
Liwei Liu,
Ding Cai-Ying
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.2205
Subject(s) - cascade , physics , time evolution , atom (system on chip) , entropy (arrow of time) , photon , atomic physics , joint quantum entropy , quantum mechanics , quantum , chemistry , chromatography , computer science , embedded system
The entropy evolution properties of field (atom) in a moving cascade three-level atom interacting with a single-mode field are studied through two photon transitions. When the atom is initially in coherent state, the influences of the atomic motion, the field-mode structure parameter and the initial average photon number on the evolution of the entropy are discussed. The results show that the entropy evolution period of the field is dependent of the atomic motion and the field-mode structure parameter. However, the parameter of the initial average photon number will neither lengthen nor shorten the entropy evolution period of the field, but the numerical values of maximum and sub-minimum of entropy will be affected by it.