e19060208h_X.pdf (282.4 kB)
Asymmetric long Josephson junction acting as a ratchet for a quantum field
journal contribution
posted on 2013-07-10, 11:22 authored by A.O. Sboychakov, Sergey SavelievSergey Saveliev, Alexander L. Rakhmanov, Franco NoriWe study the escape rate of flux quanta in a long Josephson junction having an asymmetric spatial inhomogeneous critical current density. Such a junction can behave as a ratchet when driven by an ac current in the presence of a magnetic field. This rectification gives rise to a dc voltage Vdc across the junction. The usual approach of particlelike tunneling cannot describe this rectification, and a quantum field theory description is required. We also show that, under specific conditions, the rectification direction, and consequently Vdc, can change its sign when varying the temperature T near the crossover temperature T* between the quantum and classical regimes.
History
School
- Science
Department
- Physics
Citation
SBOYCHAKOV, A.O. ... et al., 2010. Asymmetric long Josephson junction acting as a ratchet for a quantum field. Physical Review Letters, 104 (19), 190602, 4pp.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publication date
2010Notes
This article was published in the journal, Physical Review Letters [© American Physical Society].ISSN
0031-9007Publisher version
Language
- en