Ground-state dispersion and density of states from path-integral Monte Carlo. Application to the lattice polaron

Details Ground-state dispersion and density of states from path-integral Monte Carlo. Application to the lattice polaron Ground-state dispersion and density of states from path-integral Monte Carlo. Application to the lattice polaron

Publishing date

1999-02-28

URL

arxiv.org/abs/cond-mat/9903011v1

Science

Physics

Field

Condensed Matter

SubField

Strongly Correlated Electrons

Additional info

8 pages, 9 figures

Type

Scientific paper

Digital Object Identifier

10.1103/PhysRevB.60.3237

Abstract

A formula is derived that relates the ground-state dispersion of a many-body system with the end-to-end distribution of paths with open boundary conditions in imaginary time. The formula does not involve the energy estimator. It allows direct measurement of the ground-state dispersion by quantum Monte Carlo methods without analytical continuation or auxiliary fitting. The formula is applied to the lattice polaron problem. The exact polaron spectrum and density of states are calculated for several models in one, two, and three dimensions. In the adiabatic regime of the Holstein model, the polaron density of states deviates spectacularly from the free-particle shape.

Affiliated with

Also associated with

No associations

Rating

Ground-state dispersion and density of states from path-integral Monte Carlo. Application to the lattice polaron does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Ground-state dispersion and density of states from path-integral Monte Carlo. Application to the lattice polaron, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground-state dispersion and density of states from path-integral Monte Carlo. Application to the lattice polaron will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-445250