Counter-example where cosmic time keeps its original role in quantum cosmology

Details Counter-example where cosmic time keeps its original role in quantum cosmology Counter-example where cosmic time keeps its original role in quantum cosmology

2003-02-16

arxiv.org/abs/gr-qc/0302063v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pages; the talk presented to the International colloquium on the science of time "Time and Matter" at Venice International

Scientific paper

In the minisuperspace models of quantum cosmology, the absence of time in the Wheeler-DeWitt (constraint) equation, is the main point leading to the generally accepted conclusion that in the quantum cosmology there is no possibility to describe the evolution of the universe procceding in the cosmic time (the time usually used in classical cosmology). We show that in spite of the constraint, under the specific circumstances, the averaging of some of the Heisenberg equations can give nontrivial additional information about explicit time dependence of the expectation values of certain dynamical variables in quantum cosmology. This idea is realized explicitly in a higher dimensional model with a negative cosmological constant and dust as the sources of gravity. When there is an anisotropy in the evolution of the universe, the above phenomenon (i.e. explicit cosmic time dependence of certain expectation values) appears and we find the new quantum effect which consists in "quantum inflationary phase" for some dimensions and simultaneous "quantum deflationary contraction" for the remaining dimensions. The expectation value of the "volume" of the universe remains constant during this quantum "inflation-deflation" process.

Affiliated with

Also associated with

No associations

Rating

Counter-example where cosmic time keeps its original role in quantum cosmology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Counter-example where cosmic time keeps its original role in quantum cosmology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Counter-example where cosmic time keeps its original role in quantum cosmology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-404008