Journal of Physical Studies
Renormalization group and sextic effective interaction for the two-dimensional Ising model
Aleksandr Ivanovich Sokolov, E. V. Orlov
Abstract
The universal critical value g 6 of the renormalized sextic coupling constant entering the equation of state of the two{dimensional Ising model is estimated within the renormalization{group approach.Four{loop RG expansion for g6 is calculated and resummed by means of the Pad e{Borel{Leroy technique.The estimated g 6 = 1:10 is obtained which agree quite well with that deduced recently by Zinn, Lai, and Fisher from the high{temperature expansions.