Josephson Junction Ladders: Ground State and Relaxation Phenomena

Details Josephson Junction Ladders: Ground State and Relaxation Phenomena Josephson Junction Ladders: Ground State and Relaxation Phenomena

1995-04-05

arxiv.org/abs/cond-mat/9504015v1

Physics

Condensed Matter

19 pages in Latex, 11 figures available on request from: juanjo@chain.unizar.es

Scientific paper

10.1103/PhysRevB.52.10433

This paper considers a Josephson Junction array with the geometry of a ladder and anisotropy in the Josephson couplings. The ground state problem for the ladder corresponds to the one for the one-dimensional chiral XY model in a two-fold anisotropy field, which allows of a rigorous characterization of the ground state phase diagram and the relevant elementary excitations for the system. The approach to equilibrium, which we study using Langevin dynamics, shows slow relaxation, typical of systems whose energy landscape in the configuration space consists of a wealthy of metastable states, dynamically disconnected.

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