Journal article
The elusive asymptotic behavior of the high-temperature expansion of the hierarchical Ising model
Journal of statistical physics, Vol.82(1-2), pp.343-365
01/01/1996
DOI: 10.1007/BF02189234
Abstract
We present a differential formulation of the recursion formula of the hierarchical model which provides a recursive method of calculation for the high-temperature expansion. We calculate the first 30 coefficients of the high-temperature expansion of the magnetic susceptibility of the Ising hierarchical model with 12 significant digits. We study the departure from the approximation which consists in identifying the coefficients with the values they would take if a [0, 1] Padi approximant were exact. We show that, when the order in the high-temperature expansion increases, the departure from this approximation grows more slowly than for nearest neighbor models. As a consequence, the value of the critical exponent gamma estimated using Padi approximants converges very slowly and the estimations using 30 coefficients have errors larger than 0.05. A (presumably much) larger number of coefficients is necessary to obtain the critical exponents with a precision comparable to the precision obtained for nearest neighbor models with Fewer coefficients. We also discuss the possibility of constructing models where a [0, 1] Padi approximant would be exact.
Details
- Title: Subtitle
- The elusive asymptotic behavior of the high-temperature expansion of the hierarchical Ising model
- Creators
- Y Meurice - University of IowaG Ordaz - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Journal of statistical physics, Vol.82(1-2), pp.343-365
- Publisher
- Springer Nature
- DOI
- 10.1007/BF02189234
- ISSN
- 0022-4715
- eISSN
- 1572-9613
- Number of pages
- 23
- Language
- English
- Date published
- 01/01/1996
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429047802771
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