Speaker
Description
Wormholes have never been observed but proven to be valid solution to
field equations of general relativity. Patton and Wheeler postulated that
the vacuum state of the gravitational field features a Planch-scale state
virtual geometries known as quantum foam. In early universe, some of
these geometries include submicroscopic wormholes, and their existence
is governed by the uncertainty principle. It has been conjectured that
quantum fluctuations may allow wormholes to grow from submicroscopic
to microscopic scale. It is conceivable that Planck-scale wormholes may
become enlarged to macroscopic size during the inflationary phase of the
early universe, potentially creating a cosmic network. Theoritically, a
wormhole will collapse immediately to a singularity. However, it has
been postulated by Kip Thorn et al. that traversability of a wormhole
requires exotic matter to hold it open against gravitational collapse.
Matter is considered exotic with respect to the null energy condition if its
stress energy is negative. Quantum field theory permits negative energy
and fluxes, subject to certain restrictions imposed by the uncertainty
principle. In this paper, we discuss the various models proposed to
maintain the stability of the wormhole and examine how they align with
the broader framework of quantum gravity theory in the early universe.
Additionally, we will explore the effect of antimatter and the implications
of charge-parity-time reversal (CPT) violation in both flat and curved
spacetime on wormhole physics. We will consider the potential
repercussion of this verdict on the traversability of primordial wormholes.
Finally, traversable wormholes in Einstein-Dirac-Maxwell theory are
reviewed and discussed.
