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AuthorsL. Huijse, J. Halverson, P. Fendley, K. Schoutens
TitleCharge frustration and quantum criticality for strongly correlated fermions
JournalPhysical Review Letters
Volume101
Year2008
Issue14
Pages146406-
ISSN00319007
FacultyFaculty of Science
Institute/dept.FNWI: Institute for Theoretical Physics (ITF)
AbstractWe study a model of strongly correlated electrons on the square lattice which exhibits charge frustration and quantum critical behavior. The potential is tuned to make the interactions supersymmetric. We establish a rigorous mathematical result which relates quantum ground states to certain tiling configurations on the square lattice. For periodic boundary conditions this relation implies that the number of ground states grows exponentially with the linear dimensions of the system. We present substantial analytic and numerical evidence that for open boundary conditions the system has gapless edge modes.
Document typeArticle
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