Hannover 2016 – scientific programme

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P: Fachverband Plasmaphysik

P 25: Poster Session- Theory and Modelling

P 25.17: Poster

Thursday, March 3, 2016, 16:30–19:00, Empore Lichthof

Thermodynamic Fermionic Monte Carlo Simulations of Continuous Systems without Fixed Nodes — •Tobias Dornheim, Tim Schoof, Simon Groth, and Michael Bonitz — Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel

Path Integral Monte Carlo (PIMC) simulations of correlated fermions at high degeneracy are generally hampered by the fermion sign problem (FSP). Here, we combine two novel methods, the Configuration [1] and Permutation Blocking PIMC [2] approach, which, due to their complementary character of the FSP, allows us to circumvent this issue. Thereby, we are able to present accurate ab initio thermodynamic data for the uniform electron gas [3,4,5] over a broad range of parameters without the need of the fixed node approximation.

[1] T. Schoof et al., Contrib. Plasmas Phys. 51, 687 (2011)
[2] T. Dornheim et al., New J. Phys. 17, 073017 (2015)
[3] T. Schoof et al., Phys. Rev. Lett. 115, 130402 (2015)
[4] T. Dornheim et al., J. Chem. Phys. 143, 204101 (2015).
[5] S. Groth et al., arXiv:1511.03598 (2015).