Open AccessFirstorder quantum phase transition in the two-mode Dicke model
Author(s) -
Yu Li-Xian,
Qifeng Liang,
Lirong Wang,
Shiqun Zhu
Publication year - 2014
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.63.134204
Subject(s) - physics , quantum phase transition , quantum , photon , quantum phases , boson , phase transition , quantum mechanics , phase (matter) , mode (computer interface) , transformation (genetics) , atom (system on chip) , computer science , biochemistry , chemistry , gene , embedded system , operating system
The multi-mode Dicke model, which describes many atoms interacting with the multi-mode photons, has attracted much attention; it not only exhibits rich quantum phases, but also has an important application in quantum information. In this paper, we explore the ground-state properties of the two-mode Dicke model by the Holstein-Primakoff transformation and Boson expansion method, and theoretically predict a new first-order quantum phase transition. In the experiment, this quantum phase transition could be detected by measuring the mean-photon number or the atom population.