Quantum quench influenced by an excited-state phase transition

被引:84
|
作者
Perez-Fernandez, P. [1 ]
Cejnar, P. [2 ]
Arias, J. M. [1 ]
Dukelsky, J. [3 ]
Garcia-Ramos, J. E. [4 ]
Relano, A. [5 ]
机构
[1] Univ Seville, Fac Fis, Dept Fis Atom Mol & Nucl, E-41080 Seville, Spain
[2] Charles Univ Prague, Fac Math & Phys, Inst Particle & Nucl Phys, CR-18000 Prague, Czech Republic
[3] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain
[4] Univ Huelva, Dept Fis Aplicada, E-21071 Huelva, Spain
[5] Univ Complutense Madrid, Dept Fis Atom Mol & Nucl, Grp Fis Nucl, E-28040 Madrid, Spain
来源
PHYSICAL REVIEW A | 2011年 / 83卷 / 03期
关键词
RADIATION-FIELD; DYNAMICS; ORBITS;
D O I
10.1103/PhysRevA.83.033802
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We analyze excited-state quantum phase transitions (ESQPTs) in three schematic (integrable and nonintegrable) models describing a single-mode bosonic field coupled to a collection of atoms. It is shown that the presence of the ESQPT in these models affects the quantum relaxation processes following an abrupt quench in the control parameter. Clear-cut evidence of the ESQPT effects is presented in integrable models, while in a nonintegrable model the evidence is blurred due to chaotic behavior of the system in the region around the critical energy.
引用
收藏
页数:14
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