Ground state properties of fluxlines in a disordered environment

Details Ground state properties of fluxlines in a disordered environment Ground state properties of fluxlines in a disordered environment

1998-07-14

arxiv.org/abs/cond-mat/9807210v1

Phys. Rev. Lett. 81, 4488 (1998)

Physics

Condensed Matter

Superconductivity

4 pages RevTeX, 3 eps-figures included

Scientific paper

10.1103/PhysRevLett.81.4488

A new numerical method to calculate exact ground states of multi-fluxline systems with quenched disorder is presented, which is based on the minimum cost flow algorithm from combinatorial optimization. We discuss several models that can be studied with this method including their specific implementations, physically relevant observables and results: 1) the N-line model with N fluxlines (or directed polymers) in a d-dimensional environment with point and/or columnar disorder and hard or soft core repulsion; 2) the vortex glass model for a disordered superconductor in the strong screening limit and 3) the Sine-Gordon model with random pase shifts in the strong coupling limit.

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