Integral equations for thermodynamics of the osp(1|2s) integrable spin chain
نویسنده
چکیده
We propose a system of nonlinear integral equations (NLIE), which gives the free energy of the osp(1|2s) integrable spin chain at finite temperatures. In contrast with usual thermodynamic Bethe ansatz equations, our new NLIE contain only a finite number of unknown functions. On deriving NLIE, we use our osp(1|2s) version of the T system and the quantum transfer matrix method. Based on our NLIE, we also calculate the high temperature expansion of the free energy and the specific heat. PACS2001: 02.30.Rz; 02.30.Ik; 05.50.+q; 05.70.-a MSC: 82B23; 45G15; 82B20; 17B80
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