Revisiting (logarithmic) scaling relations using renormalization group

2017 Condensed Matter Physics  
We explicitly compute the critical exponents associated with logarithmic corrections (the so-called hatted exponents) starting from the renormalization group equations and the mean field behavior for a wide class of models at the upper critical behavior (for short and long range ϕ^n-theories) and below it. This allows us to check the scaling relations among these critical exponents obtained by analysing the complex singularities (Lee-Yang and Fisher zeroes) of these models. Moreover, we have
more » ... ained an explicit method to compute the exponent [defined by ξ∼ L ( L)^] and, finally, we have found a new derivation of the scaling law associated with it.
doi:10.5488/cmp.20.13601 fatcat:zsst5f4ednbudjo2t7zl37gc7m