Dissipation-driven phase transition in 2D Josephson arrays

Details Dissipation-driven phase transition in 2D Josephson arrays Dissipation-driven phase transition in 2D Josephson arrays

2004-10-18

arxiv.org/abs/cond-mat/0410437v2

Phys. Rev. Lett. 94, 157001 (2005)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.94.157001

We analyze the interplay of dissipative and quantum effects in the proximity of a quantum phase transition. The prototypical system is a resistively shunted two-dimensional Josephson junction array, studied by means of an advanced Fourier path-integral Monte Carlo algorithm. The reentrant superconducting-to-normal phase transition driven by quantum fluctuations, recently discovered in the limit of infinite shunt resistance, persists for moderate dissipation strength but disappears in the limit of small resistance. For large quantum coupling our numerical results show that, beyond a critical dissipation strength, the superconducting phase is always stabilized at sufficiently low temperature. Our phase diagram explains recent experimental findings.

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