Floating phase in a dissipative Josephson junction array
Sumanta Tewari, John Toner, Sudip Chakravarty
DOI 10.1103/PhysRevB.72.060505 · Physical Review B
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Abstract
We show that dissipative Josephson junction arrays, an extended system, have an unusual “floating” metal phase in which the states of local (0+1)-dimensional elements (single junctions) can slide past each other despite arbitrary range spatial couplings among them. The zero-temperature metal-to-superconductor quantum phase transition is controlled in any dimension by a locus of critical points fixed only by the local lattice topology. Our theory can be tested by measuring I−V characteristics. This may be the simplest and most natural example of a floating phase.
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