Thermodynamic Bethe ansatz equation for osp(1|2) integrable spin chain
Kazumitsu Sakai, Zengo Tsuboi
Abstract
The thermodynamic Bethe ansatz is applied to a quantum integrable spin chain associated with the Lie superalgebra osp(1|2). Using the string hypothesis, we derive a set of infinite number of non-linear integral equations (thermodynamic Bethe ansatz equation), which characterize the free energy. The low temperature limit of the free energy is also discussed.
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