Cooper pair boxes weakly coupled to external environments

被引：9

作者：

Benatti, Fabio ^{[1
,2
]}

Floreanini, Roberto ^{[2
]}

Realpe-Gomez, John ^{[3
,4
]}

机构：

[1] Univ Trieste, Dipartimento Fis Teor, I-34014 Trieste, Italy

[2] Ist Nazl Fis Nucl, Sez Trieste, I-34014 Trieste, Italy

[3] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy

[4] Univ Valle, Dept Fis, Cali 25360, Colombia

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2008年 / 41卷 / 23期

关键词：

D O I：

10.1088/1751-8113/41/23/235304

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the behaviour of charge oscillations in superconducting Cooper pair boxes weakly interacting with an environment. We found that, due to the noise and dissipation induced by the environment, the stability properties of these nanodevices differ according to whether the charge oscillations are interpreted as an effect of macroscopic quantum coherence, or semiclassically in terms of the Gross-Pitaevskii equation. More specifically, occupation number states, used in the quantum interpretation of the oscillations, are found to be much more unstable than coherent ones, typical of the semiclassical explanation.

引用

页数：9

共 25 条

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