Quantum Monte Carlo Study of a Disordered 2-D Josephson Junction Array
arXiv:cond-mat/0310047 · doi:10.1016/j.physc.2003.10.005
Abstract
We have studied the superconducting-insulating phase transition in a disordered two-dimensional Josephson junction array, using quantum Monte Carlo techniques. We consider disorder in both the capacitive energies and in the values of the offset charges. The calculated phase diagram shows that the lobe structure of the phase diagram disappears for sufficiently strong disorder in the offset charge. Our results agree quite well with previous calculations carried out using a mean-field approximation.
11 pages, 5 figures. To be published in Physica C. Two references are added and few typos are corrected
References in corpus (9)
- Quantum state engineering with Josephson-junction devices
- Continuous Quantum Phase Transitions
- Quantum Phase Transitions and Vortex Dynamics in Superconducting Networks
- The superconductor-insulator transition in 2D dirty boson systems
- On the Coexistence of Diagonal and off-Diagonal Long-Range Order, a Monte Carlo Study
- Universal Conductivity in the Two dimensional Boson Hubbard Model
- Phase diagram of a Disordered Boson Hubbard Model in Two Dimensions
- Mean Field Theory of Josephson Junction Arrays with Charge Frustration
- Phase diagram of Josephson junction arrays with capacitive disorder