Abstract
We propose the finite-size scaling of correlation functions in finite systems near their critical points. At a distance r in a d-dimensional finite system of size L, the correlation function can be written as the product of |r|−(d−2+η) and a finite-size scaling function of the variables r/L and tL1/v, where t = (T − Tc)=Tc, η is the critical exponent of correlation function, and v is the critical exponent of correlation length. The correlation function only has a sigificant directional dependence when |r| is compariable to L. We then confirm this finite-size scaling by calculating the correlation functions of the two-dimensional Ising model and the bond percolation in two-dimensional lattices using Monte Carlo simulations. We can use the finite-size scaling of the correlation function to determine the critical point and the critical exponent η.
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Zhang, X., Hu, G., Zhang, Y. et al. Finite-size scaling of correlation functions in finite systems. Sci. China Phys. Mech. Astron. 61, 120511 (2018). https://doi.org/10.1007/s11433-018-9266-x
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DOI: https://doi.org/10.1007/s11433-018-9266-x