Publication details
Superconductor-insulator transition in Josephson junction chains by quantum Monte Carlo calculations
| Authors | |
|---|---|
| Year of publication | 2020 |
| Type | Article in Periodical |
| Magazine / Source | Physical Review B |
| MU Faculty or unit | |
| Citation | |
| web | https://doi.org/10.1103/PhysRevB.101.024518 |
| Doi | http://dx.doi.org/10.1103/PhysRevB.101.024518 |
| Keywords | Coulomb blockade; Mott-superfluid transition; Superconductor-insulator transition; XY model |
| Description | 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. |
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