DCA for the 2D Hubbard Model at T → 0

Thomas Pruschke, Robert Zitzler, Thomas A. Maier and Mark Jarrell
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Thomas Pruschke: University of Göttingen, Institute for Theoretical Physics
Robert Zitzler: University of Augsburg, Center for Electronic Correlations and Magnetism Theoretical Physics III, Institute for Physics
Thomas A. Maier: Oak Ridge National Laboratory, Computer Science and Mathematics Division
Mark Jarrell: University of Cincinnati, Department of Physics

A chapter in High Performance Computing in Science and Engineering, Munich 2004, 2005, pp 309-318 from Springer

Abstract: Abstract We discuss single particle dynamics of the half-filled 2D Hubbard model at T → 0 calculated within the dynamical cluster approximation, using numerical renormalization group as non-perturbative cluster solver, which requires the use of parallel architectures with large number of processors and memory. In addition, fast temporal storage for large out-of-core matrices is needed. The results obtained indicate that the half-filled 2D Hubbard model at T → 0 is a paramagnetic insulator for all values of the Coulomb interaction U in strong contrast to weak-coupling theories.

Keywords: Hubbard Model; Hole Density; Exact Diagonalization; Density Matrix Renormalization Group; Periodic Boundary Condition (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:spr:sprchp:978-3-540-26657-0_28

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DOI: 10.1007/3-540-26657-7_28

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