3,796 research outputs found
Child universes UV regularization?
It is argued that high energy density excitations, responsible for UV
divergences in quantum field theories, including quantum gravity, are likely to
be the source of child universes which carry them out of the original space
time. This decoupling prevents these high UV excitations from having any
influence on physical amplitudes. Child universe production could therefore be
responsible for UV regularization in quantum field theories which takes into
account gravitational effects. Also child universe production in the last
stages of black hole evaporation, the prediction of absence of tranplanckian
primordial perturbations, connection to the minimum length hypothesis and in
particular connection to the maximal curvature hypothesis are discussed.Comment: 6 pages, RevTex, discussion to the maximum curvature hypothesis adde
Study of the spring and autumn daemon-flux maxima at the Baksan Neutrino Observatory
Detection of daemons in low-background conditions in September 2005 and March
2006 has provided evidence for the expected to occur at that times maxima in
the flux of daemons with V ~ 10-15 km s-1, which hit the Earth from near-Earth,
almost circular heliocentric orbits. The ability of some FEU-167-1 PM tubes
with a thicker inner Al coating to detect directly daemon passage through them
has also been demonstrated, an effect increasing ~100-fold the detector
efficiency. As a result, the daemon flux recorded at the maxima was increased
from ~10-9 to ~10-7 cm-2 s-1. The intensity and direction of the flux during
maxima depend on the time of day and latitude of observations (therefore,
synchronous measurements in the Northern and Southern Earth's hemispheres are
desirable). All the experimental results obtained either support the
conclusions following from the daemon paradigm or find a simple interpretation
within it.Comment: 15 pages, including 8 figures and 3 table
Wormholes and Child Universes
Evidence to the case that classical gravitation provides the clue to make
sense out of quantum gravity is presented. The key observation is the existence
in classical gravitation of child universe solutions or "almost" solutions,
"almost" because of some singularity problems. The difficulties of these child
universe solutions due to their generic singularity problems will be very
likely be cured by quantum effects, just like for example "almost" instanton
solutions are made relevant in gauge theories with breaking of conformal
invariance. Some well motivated modifcations of General Relativity where these
singularity problems are absent even at the classical level are discussed. High
energy density excitations, responsible for UV divergences in quantum field
theories, including quantum gravity, are likely to be the source of child
universes which carry them out of the original space time. This decoupling
could prevent these high UV excitations from having any influence on physical
amplitudes. Child universe production could therefore be responsible for UV
regularization in quantum field theories which take into account
semiclassically gravitational effects. Child universe production in the last
stages of black hole evaporation, the prediction of absence of tranplanckian
primordial perturbations, connection to the minimum length hypothesis and in
particular the connection to the maximal curvature hypothesis are discussed.
Some discussion of superexcited states in the case these states are Kaluza
Klein excitations is carried out. Finally, the posibility of obtaining "string
like" effects from the wormholes associated with the child universes is
discussed.Comment: Talk presented at the IWARA 2009 Conference, Maresias, Brazil,
October 2009, accepted for publication in the proceedings, World Scientific
format, 8 page
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