Thermodynamics of osp(1|2) Integrable Spin Chain: Finite Size Correction

Details Thermodynamics of osp(1|2) Integrable Spin Chain: Finite Size Correction Thermodynamics of osp(1|2) Integrable Spin Chain: Finite Size Correction

2000-11-14

arxiv.org/abs/cond-mat/0011240v1

J.Phys.Soc.Jap. 70 (2001) 367-371

Physics

Condensed Matter

Statistical Mechanics

13 pages, 1 figure, to appear in J. Phys. Soc. Jpn. Vol. 70-2

Scientific paper

10.1143/JPSJ.70.367

This note is a supplement to our previous papers: Mod. Phys. Lett. A14 (1999) 2427 (math-ph/9911010); Int. J. Mod. Phys. A15 (2000) 2329 (math-ph/9912014). The thermodynamic Bethe ansatz (TBA) equation for an integrable spin chain related to the Lie superalgebra osp(1|2) is analyzed. The central charge determined by low temperature asymptotics of the specific heat can be expressed by the Rogers dilogarithmic function, and identified to be 1. Solving the TBA equation numerically, we evaluate the several thermodynamic quantities. The excited state TBA equation is also discussed.

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