CHARACTERISTIC SCALES FOR DOMINATED TIME EVOLUTION

被引：35

作者：

SCHULMAN, LS

RANFAGNI, A

MUGNAI, D

机构：

[1] Physics Department, Clarkson University, Potsdam, NY

[2] Istituto di Ricerca sulle Onde Elettromagnetiche del CNR, Firenze, 50127

来源：

PHYSICA SCRIPTA | 1994年 / 49卷 / 05期

关键词：

D O I：

10.1088/0031-8949/49/5/005

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Physical effects associated with the so-called quantum Zeno effect are governed by a time scale associated with first and second moments of the Hamiltonian computed in the initial state of the system. For the second moment, this involves matrix elements of the Hamiltonian with respect to all other states of the system. For metastable states due to confinement by a barrier we find that the characteristic time is approximately the geometric mean of the decay time and the traversal (or tunneling) time. Values taken by these times in some physical systems are presented.

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收藏

页码：536 / 542

页数：7

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