Tunneling of localized excitations: giant enhancement due to fluctuations

Дата и время публикации : 2000-09-27T08:56:53Z

Авторы публикации и институты :
S. Flach
V. Fleurov
A. A. Ovchinnikov

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 16 pages, includes 11 figures
Первичная категория: cond-mat.stat-mech

Все категории : cond-mat.stat-mech

Краткий обзор статьи: We consider the tunneling of localized excitations (many boson bound states) in the presence of a bosonic bath. We show both analytically and numerically that the bath influence results in a dramatical enhancement of the amplitude of the excitation tunneling. The order of the bosonic flow in the course of the tunneling process is obtained. On the background of the giant tunneling enhancement we observe and describe additional resonant enhancement and {sl suppression} of tunneling due to avoided level crossings.

Category: Physics