Re: nonlinearities in QFT

From: Blake Winter (blake.winter_at_houghton.edu)
Date: 09/27/04 

Date: Mon, 27 Sep 2004 15:20:42 +0000 (UTC)

> The first article says:
> ''The nonabelian vector gauge fields are governed by a set of coupled,
> second order, nonlinear PDEs on Minkowski spacetime.''
> Clearly, this mistakes the classical nonlinear dynamics of nonabelian
> gauge fields for nonlinear quantum dynamics. But relativistic QFT does
> not give a well-defined dynamics at all; all it defines is an S-matrix.
> So the article is void.

I might add to my earlier questions, does this mean that in QFT we
can't start with some Psi describing the state of our fields at t = 0
and evolve it forward in time via d/dt Psi = H Psi, or some other such
equation?