Open AccessTransition from AdS universe to DS universe in the BPP model
Author(s) -
Wontae Kim,
Myungseok Yoon
Publication year - 2007
Publication title -
journal of high energy physics
Language(s) - English
Resource type - Journals
eISSN - 1126-6708
pISSN - 1029-8479
DOI - 10.1088/1126-6708/2007/04/098
Subject(s) - physics , cosmological constant , universe , noncommutative geometry , de sitter universe , semiclassical physics , dark energy , big rip , metric expansion of space , particle horizon , quantum cosmology , theoretical physics , mathematical physics , flatness problem , phase transition , inflation (cosmology) , energy density , cosmology , curvature , quantum mechanics , zero energy universe , quantum , constant (computer programming) , phantom energy , vacuum energy , quantum fluctuation , classical mechanics , negative energy
It can be shown that in the BPP model the smooth phase transition from theasymptotically decelerated AdS universe to the asymptotically accelerated DSuniverse is possible by solving the modified semiclassical equations of motion.This transition comes from noncommutative Poisson algebra, which gives theconstant curvature scalars asymptotically. The decelerated expansion of theearly universe is due to the negative energy density with the negative pressureinduced by quantum back reaction, and the accelerated late-time universe comesfrom the positive energy and the negative pressure which behave like darkenergy source in recent cosmological models.Comment: 12 pages, 2 figure
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