Quantum tunneling and the semiclassical real time dynamics of the density matrix

被引：17

作者：

Ankerhold, J ^{[1
]}

Grabert, H

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

[2] Univ Freiburg, Fak Phys, D-79104 Freiburg, Germany

来源：

EUROPHYSICS LETTERS | 1999年 / 47卷 / 03期

关键词：

D O I：

10.1209/epl/i1999-00385-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The time evolution of the density matrix of a system with potential barrier is determined using path integrals. Describing the quantum dynamics in terms of the semiclassical motion in the complex coordinate plane, a detailed picture of barrier penetration in the time domain and the change-over from thermal activation to quantum tunneling is gained. Deep tunneling is shown to arise from specific fluctuations about the semiclassical real time trajectories.

引用

页码：285 / 291

页数：7

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