Thermodynamics and phase transitions in the Overhauser model |
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| Authors: | N G Duffield J V Pulé |
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| Institution: | (1) Department of Mathematical Physics, University College, Belfield, Dublin 4, Ireland;(2) Dublin Institute for Advanced Studies, Dublin, Ireland |
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| Abstract: | We analyze the thermodynamics of the Overhauser model and demonstrate rigorously the existence of a phase transition. This is achieved by extending techniques previously developed to treat the BCS model in the quasi-spin formulation. Additionally, we compare the thermodynamics of the quasi-spin and full-trace BCS models. The results are identical up to a temperature rescaling. |
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| Keywords: | Overhauser model thermodynamic limit phase transitions large deviations Berezin-Lieb inequalities BCS model |
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