Scaling behavior for finite O(n) systems with long-range interaction

Details Scaling behavior for finite O(n) systems with long-range interaction Scaling behavior for finite O(n) systems with long-range interaction

2000-05-20

arxiv.org/abs/cond-mat/0005335v2

Physics

Condensed Matter

Statistical Mechanics

17 revtex pages, minor correction. new results and references are added

Scientific paper

10.1103/PhysRevE.63.026103

A detailed investigation of the scaling properties of the fully finite ${\cal O}(n)$ systems with long-range interaction, decaying algebraically with the interparticle distance $r$ like $r^{-d-\sigma}$, below their upper critical dimension is presented. The computation of the scaling functions is done to one loop order in the non-zero modes. The results are obtained in an expansion of powers of $\sqrt\epsilon$, where $\epsilon=2\sigma-d$ up to ${\cal O}(\epsilon^{3/2})$. The thermodynamic functions are found to be functions the scaling variable $z=RL^{2-\eta-\epsilon/2}U^{-1/2}$, where $R$ and $U$ are the coupling constants of the constructed effective theory, and $L$ is the linear size of the system. Some simple universal results are obtained.

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