Using the average spectrum method to extract dynamics from quantum Monte Carlo simulations

Abstract

We apply the Average Spectrum Method to the problem of getting the excitation spectrum from imaginary-time quantum Monte Carlo simulations. We show that with high quality QMC data this method reproduces the dominant spectral features very well. It is also capable of giving information on the spectrum in regions dominated by the many-particle continuum of excitations.

v2: Major revision. Title and abstract as well as the focus of the paper have been changed. Added a figure about the dynamics of 1D Heisenberg chain

References in corpus (3)

• Feedback-optimized parallel tempering Monte Carlo
• The dynamical spin structure factor for the anisotropic spin-1/2 Heisenberg chain
• Finite Temperature Dynamics of the Spin 1/2 Bond Alternating Heisenberg Antiferromagnetic Chain

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