Correlated fermions on a checkerboard lattice

Frank Pollmann, Joseph J. Betouras, Kirill Shtengel, Peter Fulde

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

A model of strongly correlated spinless fermions on a checkerboard lattice is mapped onto a quantum fully packed loop model. We identify a large number of fluctuationless states specific to the fermionic case. We also show that for a class of fluctuating states the fermionic sign problem can be gauged away. This claim is supported by numerical evaluation of the low-lying states. Furthermore, we analyze excitations at the Rokhsar-Kivelson point of this model using the relation to the height model and the single-mode approximation.

Original languageEnglish
Pages (from-to)170407
Number of pages4
JournalPhysical Review Letters
Volume97
Issue number17
DOIs
Publication statusPublished - 27 Oct 2006

Keywords

  • FRACTIONAL CHARGES
  • QUANTUM
  • MODEL
  • PYROCHLORE
  • TRANSITION
  • POINTS

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