Spectral functions of the one-dimensional Hubbard model in the U→+∞ limit:How to use the factorized wave function

Karlo Penc, Karen Hallberg, Frédéric Mila

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Abstract

We give the details of the calculation of the spectral functions of the one-dimensional Hubbard model using the spin-charge factorized wave function for several versions of the U→+∞ limit. The spectral functions are expressed as a convolution of charge and spin dynamical correlation functions. A procedure to evaluate these correlation functions very accurately for large systems is developed, and analytical results are presented for the low-energy region. These results are fully consistent with the conformal field theory. We also propose a direct method of extracting the exponents from the matrix elements in more general cases.

Original languageEnglish
Pages (from-to)15475-15488
Number of pages14
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume55
Issue number23
DOIs
Publication statusPublished - Jan 1 1997

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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