Depolarization shift of the superradiant phase transition

被引:24
作者
Griesser, Tobias [1 ]
Vukics, Andras [1 ]
Domokos, Peter [1 ]
机构
[1] Hungarian Acad Sci, Wigner Res Ctr Phys, Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary
关键词
SUPER-RADIANT PHASE; 2-LEVEL ATOMS; ELECTRODYNAMICS; GAUGE; FIELD; MODEL;
D O I
10.1103/PhysRevA.94.033815
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We investigate the possibility of a Dicke-type superradiant phase transition of an atomic gas with an extended model which takes into account the short-range depolarizing interaction between atoms that approach each other as close as the atomic size scale, which interaction appears in a regularized electric-dipole picture of the QED of atoms. By using a mean-field model, we find that a critical density does indeed exist, though the atom-atom contact interaction shifts it to a higher value than that from the bare Dicke model.
引用
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页数:7
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