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P: Fachverband Plasmaphysik

P 19: Poster: Theorie und Modellierung

P 19.18: Poster

Donnerstag, 28. Februar 2013, 14:00–16:00, Poster EG

Configuration path integral Monte Carlo simulation of correlated fermions — •Tim Schoof, Simon Groth, David Hochstuhl, Alex Filinov, and Michael Bonitz — Institut für Theoretische Physik und Astrophysik, Christian- Albrechts Universität zu Kiel, Germany

The configuration path integral Monte Carlo (CPIMC) approach for correlated many-particle systems with arbitrary pair interactions in a continuous space at finite temperatures is presented [1,2]. It is based on a representation of the N-particle density operator in a basis of (anti-)symmetrized N-particle states (configurations of occupation numbers). The method is applied to degenerate, correlated fermions in a two dimensional trap. A Restricted Active Space approach is used to reach stronger couplings (λ≤4) and larger particle numbers (N≤10). The efficiency of the method (fermion sign problem) is investigated and compared to standard Direct fermionic path integral Monte Carlo and an exact diagonalization method.

[1] T. Schoof, M. Bonitz, A. Filinov, D. Hochstuhl, and J. Dufty, Contrib. Plasma Phys. 51, 687 (2011)

[2] T. Schoof, Thermodynamische Eigenschaften entarteter, korrelierter Fermionen, Diplomarbeit, Universität Kiel (2011)