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Article Dans Une Revue Physical Review B Année : 2020

Superconductor-insulator transition in Josephson junction chains by quantum Monte Carlo calculations

Résumé

We study the zero-temperature phase diagram of a dissipationless and disorder-free Josephson junction chain. Namely, we determine the critical Josephson energy below which the chain becomes insulating, as a function of the ratio of two capacitances: the capacitance of each Josephson junction and the capacitance between each superconducting island and the ground. We develop an imaginary-time path integral Quantum Monte-Carlo algorithm in the charge representation, which enables us to efficiently handle the electrostatic part of the chain Hamiltonian. We find that a large part of the phase diagram is determined by anharmonic corrections which are not captured by the standard Kosterlitz-Thouless renormalization group description of the transition.

Dates et versions

hal-02994384 , version 1 (07-11-2020)

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Citer

Markus Holzmann, D. M. Basko, F. Pfeiffer, P. Adamus, F. W. J. Hekking. Superconductor-insulator transition in Josephson junction chains by quantum Monte Carlo calculations. Physical Review B, 2020, 101 (2), ⟨10.1103/PhysRevB.101.024518⟩. ⟨hal-02994384⟩

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