Charge oscillations in superconducting nanodevices coupled to external environments

被引：3

作者：

Alicki, Robert ^{[2
]}

Benatti, Fabio ^{[1
,3
]}

Floreanini, Roberto ^{[1
]}

机构：

[1] Ist Nazl Fis Nucl, Sez Trieste, I-34100 Trieste, Italy

[2] Univ Gdansk, Inst Theoret Phys & Astrophys, PL-80952 Gdansk, Poland

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

来源：

PHYSICS LETTERS A | 2008年 / 372卷 / 12期

关键词：

D O I：

10.1016/j.physleta.2007.10.085

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Charge oscillations in certain nanodevices, more specifically the so-called Superconducting Cooper Pair Boxes (SCB), are usually interpreted as an effect of macroscopic quantum coherence; an alternative explanation is however possible in terms of the Gross-Pitaevski equation for the classical order parameter. These two explanations are based on different quantum states assigned to the SCB, occupation number states in the first case, coherent-like states in the second one. We show that, when the SCB is weakly coupled to an external source of noise and dissipation, occupation number states are much more unstable than coherent ones. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：1968 / 1971

页数：4