https://doi.org/10.1140/epjd/e2006-00114-3
Quantum phase transition in the generalized single-mode superradiant model
1
Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing, 312000, P.R. China
2
Institute of Theoretical Physics, Shanxi University, Taiyuan, 030006, P.R. China
3
Department of mathematics, Shaoxing College of Arts and Sciences, Shaoxing, 312000, P.R. China
Corresponding authors: a chengang971@163.com chengang@zscas.edu.cn
Received:
29
October
2005
Revised:
4
March
2006
Published online:
18
May
2006
In this paper we reveal a zero-temperature quantum phase transition for the single-mode superradiant model with the form A2 from the normal to superradiant phase by mean of the Holstein-Primakoff transformation. In the thermodynamic limit, in which the numbers of atoms becomes infinite, the ground state energy and corresponding wavefunctions of both the normal and superradiant phases are obtained and therefore the scaling behavior near the critical transition point is derived.
PACS: 42.50.Fx – Cooperative phenomena in quantum optical systems / 73.43.Nq – Quantum phase transitions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006
