Optimization of field-dependent nonperturbative renormalization group flows

Details Optimization of field-dependent nonperturbative renormalization group flows Optimization of field-dependent nonperturbative renormalization group flows

2004-09-29

arxiv.org/abs/hep-th/0409300v1

Phys.Rev. B71 (2005) 012418

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.71.012418

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 $\eta = 0.044$.

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