Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-05-20
Phys. Rev. Lett. 82, 4155 (1999)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 4 figures, submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.82.4155
In this work we present a novel quantum Monte-Carlo method for fermions, based on an exact decomposition of the Boltzmann operator $exp(-\beta H)$. It can be seen as a synthesis of several related methods. It has the advantage that it is free of discretization errors, and applicable to general interactions, both for ground-state and finite-temperature calculations. The decomposition is based on low-rank matrices, which allows faster calculations. As an illustration, the method is applied to an analytically solvable model (pairing in a degenerate shell) and to the Hubbard model.
Heyde Kris
Jachowicz Natalie
Rombouts Stefan
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