Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-07-05
Phys. Rev. B 74, 155107 (2006)
Physics
Condensed Matter
Strongly Correlated Electrons
Published version
Scientific paper
10.1103/PhysRevB.74.155107
A recently developed continuous time solver based on an expansion in hybridization about an exactly solved local limit is reformulated in a manner appropriate for general classes of quantum impurity models including spin exchange and pair hopping terms. The utility of the approach is demonstrated via applications to the dynamical mean field theory of the Kondo lattice and two-orbital models. The algorithm can handle low temperatures and strong couplings without encountering a sign problem.
Millis Andrew. J.
Werner Philipp
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