Critical exponent: Difference between revisions

(self organized criticality)
==Static versus dynamic properties==
The above examples exclusively refer to the static properties of a critical system. However dynamic properties of the system may become critical, too. Especially, the characteristic time, <math>\tau_{\mathrm{char}}</math>, of a system diverges as <math>\tau_{\mathrm{char}}=\propto \xi^z</math>, with a ''dynamical exponent'' <math>z</math>. Moreover, the large ''static universality classes'' of equivalent models with identical static critical exponents decompose into smaller ''dynamical universality classes'', if one demands that also the dynamical exponents are identical.
The critical exponents can be computed from [[conformal field theory]].