1. Phase transitions in dissipative Josephson chains
- Author
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PA Peter Bobbert, Gergely T. Zimanyi, Rosario Fazio, Gerd Schön, Bobbert, Pa, Fazio, Rosario, Schon, G, Zimanyi, Gt, and Soft Matter and Biological Physics
- Subjects
Superconductivity ,Quantum phase transition ,Physics ,Josephson effect ,Phase transition ,Materials science ,Condensed matter physics ,Dissipation ,Pi Josephson junction ,Dipole ,Condensed Matter::Superconductivity ,Coulomb ,Dissipative system ,Quantum fluctuation - Abstract
We study the zero temperature phase transitions of a chain of Josephson junctions, taking into account the quantum fluctuations due to the charging energy and the effects of an Ohmic dissipation. We map the problem onto a generalized Coulomb gas model, which then is transformed into a sine-Gordon field theory. Apart from the expected dipole unbinding transition, which describes a transition between globally superconducting and resistive behavior, we find a quadrupole unbinding transition at a critical strength of the dissipation. This transition separates two superconducting states characterized by different local properties.
- Published
- 1990
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