2003/06/30 by Luca Capriotti, Alessandro Cuccoli, Andrea Fubini +3 · 1 citation
Physics and Astronomy · #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Theoretical and Computational Physics #cond-mat.mes-hall #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.91.247004
published as Phys. Rev. Lett. 91, 247004 (2003) · 4 pages, 7 figures, to appear in Phys.Rev.Lett
arxiv created 2003/11/17 · openalex publication_date 2003/12/12 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The phase diagram of a 2D Josephson junction array with large substrate resistance, described by a quantum XY model, is studied by means of Fourier path-integral Monte Carlo. A genuine Berezinskii-Kosterlitz-Thouless transition is found up to a threshold value g( small star, filled ) of the quantum coupling, beyond which no phase coherence is established. Slightly below g( small star, filled ) the phase stiffness shows a reentrant behavior with temperature, in connection with a low-temperature disappearance of the superconducting phase, driven by strong nonlinear quantum fluctuations.