Cosmology with Vacuum enegy and Child Universes
Eduardo Guendelman (Physics Department, Ben Gurion University, Beer Sheva, Israel)
Abstract
General Notions of Cosmology are reviewed. The role
of Vacuum Energy in the Early Universe Accelelated Expansion
(Inflation) and for the present universe, also known to be
accelerated,will be discussed. The notion of "local inflation"
of a vacuum bubble leads naturally to the "child universe " solutions, where
a new universe is created which eventually disconnects from the
'parent' one. The role of solitons, like magnetic monopoles and others for the
creationof a universe in the 'laboratory' , both at the
classical and quantum level, will be discussed. The basic 'engine' that makes possible
and governs all these processes is the vacuum energy.
We end with some comment regading some new approaches to the so called
'cosmological constant problem' which consists of the problem of
how to explain the tremendous difference between the vacuum energy now
and in the early universe .