Title: A new renormalization approach to the ground state of the anisotropic XY model
Authors: Dekeyser, Raf ×
Drzewinski, A
van Leeuwen, JMJ #
Issue Date: 1994
Publisher: Pub. House of the Slovak Academy of Sciences
Series Title: Acta Physica Slovaca vol:44 pages:357-364
Abstract: The renormalization scheme recently proposed by White is applied to the d=1 anisotropic XY model in a transverse field (AXY). A flow diagram, critical exponents and energies have been calculated. It is found that this scheme is a distinct improvement over the standard technique as far as the computation of the ground state is concerned. The accuracy increases rapidly, when we keep more states in each renormalization step, but the errors in the ground state energy are always the largest in the neighborhood of the phase transitions. Comparing with the Ising model in a transverse field, on account of more complicated symmetries, the AXY demands more precautions during constructing a renormalization group transformation.
ISSN: 0323-0465
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Theoretical Physics Section
× corresponding author
# (joint) last author

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