Thermodynamics of the Anisotropic Heisenberg Chain Calculated by the Density Matrix Renormalization Group Method.

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  • Shibata Naokazu
    Institute for Solid State Physics, University of Tokyo, 7–22–1 Roppongi, Minato–ku, Tokyo 106

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Other Title
  • Thermodynamics of the Anisotropic Heise
Published
1997
DOI
  • 10.1143/jpsj.66.2221
  • 10.48550/arxiv.cond-mat/9706152
Publisher
THE PHYSICAL SOCIETY OF JAPAN

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Description

The density matrix renormalization group (DMRG) method is applied to the anisotropic Heisenberg chain at finite temperatures. The free energy of the system is obtained using the quantum transfer matrix which is iteratively enlarged in the imaginary time direction. The magnetic susceptibility and the specific heat are calculated down to T=0.01J and compared with the Bethe ansatz results. The agreement including the logarithmic correction in the magnetic susceptibility at the isotropic point is fairly good.

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