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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/12722

Title: Asymmetric long Josephson junction acting as a ratchet for a quantum field
Authors: Sboychakov, A.O.
Savel'ev, Sergey
Rakhmanov, Alexander L.
Nori, Franco
Issue Date: 2010
Publisher: © American Physical Society
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.
Abstract: We 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.
Description: This article was published in the journal, Physical Review Letters [© American Physical Society].
Version: Published
DOI: 10.1103/PhysRevLett.104.190602
URI: https://dspace.lboro.ac.uk/2134/12722
Publisher Link: http://dx.doi.org/10.1103/PhysRevLett.104.190602
ISSN: 0031-9007
Appears in Collections:Published Articles (Physics)

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