Please teach me this:(adsbygoogle = window.adsbygoogle || []).push({});

In QTF theory of Schroeder,chapter 13.1 saying:

Just at t=0(t=[itex]\frac{T-T_{c}}{T_{c}}[/itex]),the correlation should decay as power law.

Define the exponent [itex]\eta[/itex] by the formula:

G(x)=[itex]\frac{1}{x^{d-2+\eta}}[/itex]

where d is Euclidien space dimension.

I do not understand why at critical point, the correlation function decay as power law.Please give me a to favour to explain this.

Thank you very much in advance.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Why correlation function decay as power law at critical temperature point?

**Physics Forums | Science Articles, Homework Help, Discussion**