  Within the finite-time-path out-of-equilibrium quantum field theory (QFT), we
calculate direct photon emission from early stages of heavy ion collisions,
from a narrow window, in which uncertainty relations are still important and
they provide a new mechanism for production of photons. The basic difference
with respect to earlier calculations, leading to diverging results, is that we
use renormalized QED of quarks and photons. Our result is a finite contribution
that is consistent with uncertainty relations.
