Abstract
Since only a few lattice models can be solved explicitly, one is interested in efficient approximation schemes. A simple and universally applicable approximation is the mean field approximation (MFA) which yields qualitatively correct results for many lattice systems.
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Notes
- 1.
The exponent β should not be confused with the inverse temperature.
- 2.
Extensions of the theory are applicable to first-order phase transitions as well.
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Wipf, A. (2021). Mean Field Approximation. In: Statistical Approach to Quantum Field Theory. Lecture Notes in Physics, vol 992. Springer, Cham. https://doi.org/10.1007/978-3-030-83263-6_7
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