From spin ladders to the 2D O(3) model at non-zero density

Journal Article (Journal Article)

The numerical simulation of various field theories at non-zero chemical potential suffers from severe complex action problems. In particular, QCD at non-zero quark density can presently not be simulated for that reason. A similar complex action problem arises in the 2D O(3) model - a toy model for QCD. Here we construct the 2D O(3) model at non-zero density via dimensional reduction of an antiferromagnetic quantum spin ladder in a magnetic field. The complex action problem of the 2D O(3) model manifests itself as a sign problem of the ladder system. This sign problem is solved completely with a meron cluster algorithm. © 2002 Elsevier Science B.V. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Chandrasekharan, S; Scarlet, B; Wiese, UJ

Published Date

  • January 1, 2002

Published In

Volume / Issue

  • 147 / 1-2

Start / End Page

  • 388 - 393

International Standard Serial Number (ISSN)

  • 0010-4655

Digital Object Identifier (DOI)

  • 10.1016/S0010-4655(02)00311-9

Citation Source

  • Scopus