Re: lattice gauge theories(What are they???)

Posted by phobos on June 26, 19101 at 07:34:59:

In Reply to: lattice gauge theories(What are they???) posted by php on June 26, 19101 at 05:56:56:

One way to regularize the infinities in quantum field theories is to define them on a spacetime lattice, where only a countable number of points define all of spacetime. This makes the gauge fields discrete and allows one to compute difficult transition processes by standard (and some not-so-standard) numerical techniques used to solve differential equations. One then takes the limit of these results as the lattice spacing approaches 0 and the lattice becomes a continuum in order to extract real-world predictions. Such an approach is most often used for QCD, where processes at low energies are nigh-impossible to describe perturbatively.

phobos

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