what is the exact meaning of mean field approximation works above a critical dimensio

by wdlang
Tags: approximation, critical, dimensio, exact, field, meaning
wdlang is offline
Nov12-12, 10:26 AM
P: 304
what does it means exactly?

take the d-dimensional ising model as an example

suppose d>d_c

does it mean that the critical temperature is correctly captured by the mean field theory?

or does it just mean that the critical indices are correctly captured by the mean field theory?
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