Tunneling of localized excitations: Giant enhancement due to fluctuations

被引：13

作者：

Flach, S

Fleurov, V

Ovchinnikov, AA

机构：

[1] MPIPKS, D-01187 Dresden, Germany

[2] Tel Aviv Univ, Sch Phys & Astron, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.63.094304

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 suppression of tunneling due to avoided level crossings.

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页数：9

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