Decoherence as a probe of coherent quantum dynamics

被引：29

作者：

d'Arcy, MB

Godun, RM

Summy, GS

Guarneri, I

Wimberger, S

Fishman, S

Buchleitner, A

机构：

[1] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England

[2] Oklahoma State Univ, Dept Phys, Stillwater, OK 74078 USA

[3] Univ Insubria, I-22100 Como, Italy

[4] Ist Nazl Fis Mat, Unita Milano, I-20133 Milan, Italy

[5] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[6] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[7] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

来源：

PHYSICAL REVIEW E | 2004年 / 69卷 / 02期

关键词：

D O I：

10.1103/PhysRevE.69.027201

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The effect of decoherence, induced by spontaneous emission, on the dynamics of cold atoms periodically kicked by an optical lattice is experimentally and theoretically studied. Ideally, the mean energy growth is essentially unaffected by weak decoherence, but the resonant momentum distributions are fundamentally altered. It is shown that experiments are inevitably sensitive to certain nontrivial features of these distributions, in a way that explains the puzzle of the observed enhancement of resonances by decoherence [Phys. Rev. Lett. 87, 074102 (2001)]. This clarifies both the nature of the coherent evolution, and the way in which decoherence disrupts it.

引用

页码：027201 / 1

页数：4