Floating phase in a dissipative Josephson junction array

Details Floating phase in a dissipative Josephson junction array Floating phase in a dissipative Josephson junction array

2004-07-13

arxiv.org/abs/cond-mat/0407308v3

Phys. Rev. B 72, 060505(R) (2005).

Physics

Condensed Matter

Statistical Mechanics

4 pages, RevTex4. The revised version contains higher order renormalization group equations and the corresponding phase diagra

Scientific paper

10.1103/PhysRevB.72.060505

We consider dissipative quantum phase transitions in Josephson junction arrays and show that the disordered phase in this extended system can be viewed as an unusual floating phase in which the states of local $(0+1)$-dimensional elements (single Josephson junctions) can slide past each other despite arbitrary range spatial couplings among them. The unusual character of the metal-superconductor quantum critical point can be tested by measurements of the current voltage characteristic. This may be the simplest and most natural example of a floating phase.

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