Functional Integrals and Free Energy in sine-Gordon-Thirring Model with Impurity Coupling |
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| Authors: | YAN Jun |
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| Affiliation: | Department of Physics, Sichuan Normal University, Chengdu 610066, China |
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| Abstract: | The free energy at low temperature in 1D sine-Gordon-Thirring model with impurity coupling is studied by means of functional integrals method. For massive free sine-Gordon-Thirring model, free energy is obtained from perturbation expansion of functional determinant. Moreover, the free energy of massive model is calculated by use of an auxiliary Bose field method. |
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| Keywords: | functional integrals free energy sine-Gordon-Thirring model |
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