Speaker
Aidan Chatwin-Davies
Description
The effects that quantum gravity-motivated natural UV
cutoffs at the
Planck scale have on inflationary predictions for the CMB
have garnered
much interest in the literature. These studies have so far
been mostly
confined to UV cutoffs that are locally Lorentz symmetry-
breaking.
Here, we propose a locally Lorentz covariant approach
which takes the
form of a cutoff on the local density of dynamical degrees
of freedom
of the field theory. This cutoff thus has an intuitive
information
theoretic interpretation. We are studying the type and
magnitude of
possible signatures that this covariant cutoff would have
in the CMB.
The techniques we employ tie in naturally with recent
results in
spectral geometry that showed that spacetime could be
simultaneously
continuous and discrete in the same way that
information can be.
