Non-equilibrium transitions in fully frustrated Josephson junction arrays

We study the effect of thermal fluctuations in a fully frustrated Josephson junction array driven by a current I larger than the apparent critical current I_c(T). We calculate numerically the behavior of the chiral order parameter of Z_2 symmetry and the transverse helicity modulus (related to the U...

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Bibliographic Details
Published inarXiv.org
Main Authors Marconi, Veronica I, Dominguez, Daniel
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.02.2001
Subjects
Critical current (superconductivity)
Helicity
Josephson junctions
Order parameters
Quantum theory
Symmetry
Variations
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Summary:We study the effect of thermal fluctuations in a fully frustrated Josephson junction array driven by a current I larger than the apparent critical current I_c(T). We calculate numerically the behavior of the chiral order parameter of Z_2 symmetry and the transverse helicity modulus (related to the U(1) symmetry) as a function of temperature. We find that the Z_2 transition occurs at a temperature T_{Z_2}(I) which is lower than the temperature T_{U(1)}(I) for the U(1) transition. Both transitions could be observed experimentally from measurements of the longitudinal and transverse voltages.
ISSN:2331-8422
DOI:10.48550/arxiv.0102356