Title: Renormalization-group approach to 2-dimensional quantum models
Authors: Rogiers, Joseph ×
Dekeyser, Raf #
Issue Date: 1976
Publisher: Published for the American Physical Society by the American Institute of Physics
Series Title: Physical Review B, Condensed Matter vol:13 issue:11 pages:4886-4889
Abstract: The two-dimensional XY and Heisenberg models are studied with a quantum-mechanical generalization of
the Niemeijer and Van Leeuween renormalization-group method. In second-order cumulant expansion a fixed
point exists for the XY model, giving a critical temperature at J/kTc ~ 0.87 +- 0.05. For the Heisenberg model we find a fixed point at K* = 2.8. This result may not be reliable, since the truncation of the cumulant expansion is only valid for small K.
ISSN: 0163-1829
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
× corresponding author
# (joint) last author

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