پديدآورندگان :
Lewandowski J Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland , Nouri-Zonoz M Department of Physics, University of Tehran, 14395-547 Tehran, Iran , Parvizi A Department of Physics, University of Tehran, 14395-547 Tehran, Iran , Tavakoli Y Department of Physics, University of Tehran, 14395-547 Tehran, Iran
چكيده فارسي :
We show that, in a test field approximation, the evolution equation of quantum electromagnetic (EM)
field propagating on an isotropic cosmological quantum space-time corresponds to quantum
evolution of the same test EM field on an emerging effective (dressed) space-time. When only a
test field approximation is assumed, all field modes probe the same effective background. However,
when the back-reaction of the field modes on the quantum geometry is taken into account, through
a Born-Oppenheimer approximation, a rainbow (i.e., a mode-dependent) metric emerges on which
the local Lorentz symmetry is violated.
