%0 Journal Article
%T Critical Property of the Geometric Phase in the Dicke Model with the Dipole-dipole Interactions<br>
%A Yunfeng WU Ping ZHANG Jianzhou ZHENG College of science
%A Dalian Nationalities University
%A Dalian
%A China
%A <br>
%J 材料科学技术学报
%D 2008
%I 
%X We obtained the ground-state energy level and associated geometric phase in the Dicke model with the dipole-dipole interactions analytically by the Holstein-Primakoff transformation and the boson expansion approach in the thermodynamic limit.The nonadiabatic geometric phase induced by the photon field was derived with the time-dependent unitary transformation.It is shown that dipole-dipole interactions have a deep influence on scaled behavior of the geometric phase at the critical point.
%K Geometric phases
%K Quantum phase transition
%K Dipole-dipole interactions<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=F701A0C5412C6ACE3A3AEBFE07218097&yid=67289AFF6305E306&vid=B91E8C6D6FE990DB&iid=B31275AF3241DB2D&sid=40700C9CB4E84E3B&eid=CFC2B32D03D9F610&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=29