Temperature crossover of decoherence rates in chaotic and regular bath dynamics

被引：7

作者：

Sanz, A. S. ^{[1
]}

Elran, Y. ^{[2
]}

Brumer, P. ^{[3
,4
]}

机构：

[1] Inst Fis Fundamental IFF CSIC, Madrid 28006, Spain

[2] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[3] Univ Toronto, Chem Phys Theory Grp, Dept Chem, Toronto, ON M5S 3H6, Canada

[4] Univ Toronto, Ctr Quantum Informat & Quantum Control, Toronto, ON M5S 3H6, Canada

来源：

PHYSICAL REVIEW E | 2012年 / 85卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MATRIX-ELEMENTS; KRAUS DECOMPOSITION; QUANTUM; SYSTEM; ENTANGLEMENT; RELAXATION;

D O I：

10.1103/PhysRevE.85.036218

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 chaotic bath dynamics on the decoherence of a quantum system is examined for the vibrational degrees of freedom of a diatomic molecule in a realistic, constant temperature collisional bath. As an example, the specific case of I-2 in liquid xenon is examined as a function of temperature, and the results compared with an integrable xenon bath. A crossover in behavior is found: The integrable bath induces more decoherence at low bath temperatures than does the chaotic bath, whereas the opposite is the case at the higher bath temperatures. These results, verifying a conjecture due to Wilkie, shed light on the differing views of the effect of chaotic dynamics on system decoherence.

引用

页数：6

共 56 条

[11] Kraus decomposition for chaotic environments including time-dependent subsystem Hamiltonians [J].