Quantum Phase Transitions and Persistent Currents in Josephson-Junction Ladders
arXiv:cond-mat/0302567 · doi:10.1103/PhysRevB.68.144506
Abstract
In this work we study quantum phase transitions and persistent currents in capacitively coupled one-dimensional Josephson-junction arrays. We will focus particularly on the roles of exciton-like pairs in the strong coupling limit in the presence of external gate charges and magnetic fluxes. We use the numerical density-matrix renormalization group method for the study in the full range of values of gate charge and magnetic flux. To clarify the various effects, we report the pair correlation functions and the exciton densities as welll as the persistent current.
To appear in Phys. Rev. B; title has been changed; a few parts of the text have been change; 12 pages, 17 figures
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- Variational tight-binding method for simulating large superconducting circuits
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- Defect Motion and Lattice Pinning Barrier in Josephson-Junction Ladders
- Efficient modeling of superconducting quantum circuits with tensor networks
- Persistent current in a 2D Josephson junction array wrapped around a cylinder
- Thermal fluctuations of the Josephson current in a ring of superconducting grains