Optimization of field-dependent nonperturbative renormalization group flows

Abstract

We investigate the influence of the momentum cutoff function on the field-dependent nonperturbative renormalization group flows for the three-dimensional Ising model, up to the second order of the derivative expansion. We show that, even when dealing with the full functional dependence of the renormalization functions, the accuracy of the critical exponents can be simply optimized, through the principle of minimal sensitivity, which yields $\nu =0.628$ and $\eta =0.044$.

4 pages, 3 figures

References in corpus (2)

• Exact evolution equation for the effective potential
• The Wilson-Polchinski exact renormalization group equation

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