Citation
B. Shao et al., Unitary evolution and quantum fluctuation in SQUID, COMM TH PHY, 34(4), 2000, pp. 617-622
Citations number
13
Categorie Soggetti
Physics
Journal title
COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN journal
02536102
→ ACNP
Volume
34
Issue
4
Year of publication
2000
Pages
617 - 622
Database
ISI
SICI code
0253-6102(200012)34:4<617:UEAQFI>2.0.ZU;2-C
Abstract
A circular superconductor with a weak-link junction is considered in the pr
esence of a dc voltage bias. Using a time-dependent perturbed method, we ob
tain a unitary evolution operator or the driven SQUID system. We investigat
e the step structure of the screening current in the system and show that,
due to the Josephson nonlinear term, the Aux and charge can exhibit reduced
quantum fluctuation behavior.