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I What is the formal definition of a Universality Class?

  1. Dec 2, 2017 #1
    Hi guys,

    I have been reading some of the literature recently concerning the Kardar-Parisi-Zhang equation and the words "universality" and "KPZ universality class" keep appearing. I already did a cursory wikipedia search on the subject, but it did not make much sense to me.

    Can you please explain to this undergraduate what a universality class is in statistical mechanics (preferably with a formal definition), and how scaling exponents are important in their definition?
  2. jcsd
  3. Dec 7, 2017 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
  4. Dec 7, 2017 #3

    Stephen Tashi

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    Science Advisor

    Not that I know anything about the Kardar-Parisi-Zhang equation, but I found this definition in searching the web:

    From: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332006000500030
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