Critical temperatures of continuous spin models and the free energy of a polymer
- 1 December 1975
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 63 (11) , 4941-4946
- https://doi.org/10.1063/1.431239
Abstract
The critical temperature Tc(n,d) of a classical n-component spin model with a general continuous spin distribution on a d-dimensional hypercubic lattice is expanded in inverse powers of d to order 1/d3. The general result differs significantly from the special case of fixed spin length owing to changes in the graphical structure of the high temperature expansion. In the limit n→0 the model becomes identical to the general self-interacting random walk or polymer problem: The Boltzmann factors for self-intersections in the walks correspond to the moments of the spin distribution functions, and Tc(0,d) yields the polymer free energy.Keywords
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