Efficient DMFT simulation of the Holstein-Hubbard model

ORAL

Abstract

We show that the hybridization expansion algorithm for quantum impurity models [PRL 97, 076405 (2006)] can easily handle a Holstein coupling to phonons. Our approach, which is based on the Lang-Firsov transformation, treats the phonons without approximations and does not affect the overall scaling of the algorithm. We apply the method to the Holstein-Hubbard model in the single site dynamical mean field approximation.

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Authors

  • Philipp Werner

    Columbia University

  • Andrew Millis

    Columbia University, Columbia University, 538 West, 120th Street, New York, NY 10027, USA, Department of Physics, Columbia University