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

来源：

PHYSICAL REVIEW A | 2016年 / 94卷 / 03期

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

页数：7

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