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

页数：14

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