Abstract
We perform high-accuracy calculations of the critical exponent and its subleading exponent for the Dyson’s hierarchical model for up to 20. We calculate the critical temperatures for the nonlinear sigma model measure . We discuss the possibility of extracting the first coefficients of the expansion from our numerical data. We show that the leading and subleading exponents agree with the Polchinski equation and the equivalent Litim equation, in the local potential approximation, with at least 4 significant digits.
- Received 18 November 2005
DOI:https://doi.org/10.1103/PhysRevD.73.047701
©2006 American Physical Society