Thermodynamics of the anisotropic Heisenberg chain calculated by the density matrix renormalization group method

Details Thermodynamics of the anisotropic Heisenberg chain calculated by the density matrix renormalization group method Thermodynamics of the anisotropic Heisenberg chain calculated by the density matrix renormalization group method

1997-06-15

arxiv.org/abs/cond-mat/9706152v2

J. Phys. Soc. Jpn. 66, 2221-2223 (1997)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 Postscript figures, REVTeX, to appear in J. Phys. Soc. Jpn. Vol.66 No.8 (1997)

Scientific paper

10.1143/JPSJ.66.2221

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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