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Title: Calculation of free energy of the integrable Landau-Lifshitz model
Authors: Cai, C.-Z. 
Wang, W.-L.
Chen, Y.-Z. 
Issue Date: Jul-2003
Citation: Cai, C.-Z., Wang, W.-L., Chen, Y.-Z. (2003-07). Calculation of free energy of the integrable Landau-Lifshitz model. Chinese Physics Letters 20 (7) : 1009-1012. ScholarBank@NUS Repository.
Abstract: The generalized Bethe-ansatz method of thermodynamic analysis of integrable systems was employed to compute the free energy of a classical integrable model, i.e., the Landau-Lifshitz model. Using the action-angle variables of the model and by imposing a periodic boundary condition, we derive a phase-shifted density of states for the excitations of the system. The free energy, in the thermodynamic limit, can be expressed analytic in terms of two coupled nonlinear integral equations of the finite temperature excited energy for effective phonons and kinks (antikinks). We solve these equations iteratively for a special case that the model is in the limit of anisotropic strong yz coupling.
Source Title: Chinese Physics Letters
ISSN: 0256307X
DOI: 10.1088/0256-307X/20/7/311
Appears in Collections:Staff Publications

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