Is there a spontaneous breaking of the parity symmetry of the Jaynes-Cummings model without the rotating-wave approximation?

被引：5

作者：

Lo, CF ^{[1
]}

Liu, KL ^{[1
]}

Ng, KM ^{[1
]}

Yuen, PH ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Phys, Shatin, New Territories, Peoples R China

来源：

QUANTUM AND SEMICLASSICAL OPTICS | 1998年 / 10卷 / 06期

关键词：

D O I：

10.1088/1355-5111/10/6/003

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Recently, Bishop and co-workers (1996 Phys. Rev. A 54 R4657) applied the coupled-cluster method to study the ground state of the Jaynes-Cummings model without the rotating-wave approximation and reported strong evidence for a second-order quantum phase transition which was believed to be caused by spontaneous breaking of the parity symmetry of the system. In the present work we have re-investigated this conjecture via examining the nature of the exact (numerical) ground state of the system. Our analysis has indicated that the ground state has definite positive parity and there is no spontaneous breaking of the parity symmetry of the system.

引用

页码：L63 / L68

页数：6

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