The lambda extensions of the Ising correlation functions C(M, N)
| Autor: | S Boukraa, J-M Maillard |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Statistics and Probability
Statistical Mechanics (cond-mat.stat-mech) Modeling and Simulation General Physics and Astronomy FOS: Physical sciences 34M55 47E05 81Qxx 32G34 34Lxx 34Mxx 14Kxx Statistical and Nonlinear Physics Mathematical Physics (math-ph) Mathematical Physics Condensed Matter - Statistical Mechanics |
| Popis: | We revisit, with a pedagogical heuristic motivation, the lambda extension of the low-temperature row correlation functions C(M,N) of the two-dimensional Ising model. In particular, using these one-parameter series to understand the deformation theory around selected values of $\lambda$, namely $\lambda = \cos(\pi \, m/n)$ with m and n integers, we show that these series yield perturbation coefficients, generalizing form factors, that are D-finite functions. As a by-product these exact results provide an infinite number of highly non-trivial identities on the complete elliptic integrals of the first and second kind. These results underline the fundamental role of Jacobi theta functions and Jacobi forms, the previous D-finite functions being (relatively simple) rational functions of Jacobi theta functions, when rewritten in terms of the nome of elliptic functions. Comment: 35 pages |
| Databáze: | OpenAIRE |
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