Monte Carlo calculation of dynamical properties of the two-dimensional Hubbard model

S. R. White; D. J. Scalapino; R. L. Sugar; N. E. Bickers

doi:10.1103/PhysRevLett.63.1523

Monte Carlo calculation of dynamical properties of the two-dimensional Hubbard model

S. R. White, D. J. Scalapino, R. L. Sugar, and N. E. Bickers

Phys. Rev. Lett. 63, 1523 – Published 2 October 1989

Abstract

A new method is introduced for analytically continuing imaginary-time data from quantum Monte Carlo calculations to the real-frequency axis. The method is based on a least-squares fitting procedure with constraints of positivity and smoothness on the real-frequency quantities. Results are shown for the single-particle spectral-weight function and density of states for the half-filled two-dimensional Hubbard model.

Received 5 June 1989

DOI:https://doi.org/10.1103/PhysRevLett.63.1523

Authors & Affiliations

S. R. White, D. J. Scalapino, and R. L. Sugar

Department of Physics, University of California, Santa Barbara, Santa Barbara, California 93106

N. E. Bickers

Department of Physics, University of Southern California, Los Angeles, California 90089
Institute for Theoretical Physics, University of California, Santa Barbara, Santa Barbara, California 93106