Generalized Mittag-Leffler functions in the theory of finite-size scaling for systems with strong anisotropy and/or long-range interaction

Abstract

The difficulties arising in the investigation of finite-size scaling in $d$--dimensional O(n) systems with strong anisotropy and/or long-range interaction, decaying with the interparticle distance $r$ as $r^{-d-\sigma }$ ($0<\sigma \le 2$), are discussed. Some integral representations aiming at the simplification of the investigations are presented for the classical and quantum lattice sums that take place in the theory. Special attention is paid to a more general form allowing to treat both cases on an equal footing and in addition cases with strong anisotropic interactions and different geometries. The analysis is simplified further by expressing this general form in terms of a generalization of the Mittag-Leffler special functions. This turned out to be very useful for the extraction of asymptotic finite-size behaviours of the thermodynamic functions.

Accepted for publication in J. Phys. A: Math. and Gen.; 14 pages. The manuscript has been improved to help readers

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Cited by in corpus (6)

• The Prabhakar or three parameter Mittag--Leffler function: theory and application
• A practical guide to Prabhakar fractional calculus
• Lamperti-type laws
• Quantum phase transition in the spin-anisotropic quantum spherical model
• Solutions of certain fractional kinetic equations and a fractional diffusion equation
• Solutions of the Fractional Reaction Equation and the Fractional Diffusion Equation