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arxiv: 1712.10304 · v2 · pith:B43ZPQDHnew · submitted 2017-12-29 · ❄️ cond-mat.str-el

Determinant Monte Carlo algorithms for dynamical quantities in fermionic systems

classification ❄️ cond-mat.str-el
keywords carlomontealgorithmsdynamicalfermionicquantitiessystemsaccuracy
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We introduce and compare three different Monte Carlo determinantal algorithms that allow one to compute dynamical quantities, such as the self-energy, of fermionic systems in their thermodynamic limit. We show that the most efficient approach expresses the sum of a factorial number of one-particle-irreducible diagrams as a recursive sum of determinants with exponential complexity. By comparing results for the two-dimensional Hubbard model with those obtained from state-of-the-art diagrammatic Monte Carlo, we show that we can reach higher perturbation orders and greater accuracy for the same computational effort.

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