8,573 research outputs found
Inflationary universe in Kaluza-Klein theories
We describe extended inflation and its typical problems. We then briefly
review essential features of Kaluza-Klein theory, and show that it leads to a
scenario of inflationary cosmology in four dimensions. The problem of stable
compactification of extra spatial dimensions is discussed. The requirements for
successful extended inflation lead to constraints on the parameters of higher
dimensional models.Comment: Latex, 13 pages (Review talk at the YATI meeting at SNBNCBS,
Calcutta. To appear in Ind. Jour. Phys.
Aspects of nonlocality in atom-photon interactions in a cavity
We investigate a Bell-type inequality for probabilities of detected atoms
formulated using atom-photon interactions in a cavity. We consider decoherence
brought about by both atomic decay, as well as cavity photon loss, and study
its quantitative action in diminishing the atom-field and the resultant
atom-atom secondary correlations. We show that the effects of decoherence on
nonlocality can be observed in a controlled manner in actual experiments
involving the micromaser and also the microlaser.Comment: 9 pages, 3 .eps figures, Revtex. Revised version with details of
calculations and more result
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