Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-08-04
Europhysics Letters 74, 341 (2006)
Physics
Condensed Matter
Statistical Mechanics
7+ pages, 3 eps figures, Europhysics Letters preprint format, as published
Scientific paper
10.1209/epl/i2005-10528-9
We study the T=0 normal to superconducting transition of Josephson arrays with {\it on-site} dissipation. A perturbative renormalization group solution is given. Like the previously studied case of {\it bond} dissipation (BD), this is a "floating" to coupled (FC) phase transition. {\it Unlike} the BD transition, at which {\it only} nearest-neighbor couplings become relevant, here {\it all} inter-grain couplings, out to {\it infinitely} large distances, do so simultaneously. We predict, for the first time in an FC transition, a diverging spatial correlation length. Our results show the robustness of floating phases in dissipative quantum systems.
Tewari Sumanta
Toner John
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