Healing the cosmological constant problem during inflation through a
  unified quasi-quintessence matter field
  We heal the cosmological constant problem by means of a \emph{cancellation
mechanism} that adopts a phase transition during which quantum fluctuations are
eliminated. To this purpose, we propose that a generalized scalar (dark) matter
field with a non-vanishing pressure term can remove the vacuum energy
contribution, if its corresponding thermodynamics is written in terms of a
\emph{quasi-quintessence} representation. In such a picture, pressure differs
from quintessence as it shows a zero kinetic contribution. Using this field, we
investigate a metastable transition phase, in which the universe naturally
passes through an inflationary phase. To reach this target, we single out a
double exponential potential, describing the metastable inflationary dynamics
by considering suitable boundaries and thermodynamic conditions. We analyze
stability investigating saddle, stable and unstable points and we thus predict
a chaotic inflation that mimics the Starobinsky exponential potential.
Consequently, the role of the proposed dark matter field is investigated
throughout the overall universe evolution. To do so, we provide a physical
explanation on unifying the dark sector with inflation by healing the
cosmological constant problem.
