Josephson junction ladders: Ground state and relaxation phenomena

Journal Article · Sun Oct 01 00:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.10433· OSTI ID:239375

Mazo, J J; Falo, F; Floria, L M ^[1]

---

1. Instituto de Ciencia de Materiales de Aragon, Consejo Superior de Investigaciones Cientificas, Universidad de Zaragoza, 50009 Zaragoza (Spain)

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 {ital XY} model in a twofold anisotropy field, which allows for 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 wealth of metastable states, dynamically disconnected.

• OSTI ID: 239375
• Journal Information: Physical Review, B: Condensed Matter, Vol. 52, Issue 14; Other Information: PBD: 1 Oct 1995
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
JOSEPHSON JUNCTIONS
GROUND STATES
RELAXATION
ANISOTROPY
ONE-DIMENSIONAL CALCULATIONS
PHASE DIAGRAMS
LANGEVIN EQUATION
METASTABLE STATES