Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2004-07-19
Phys.Rev.Lett. 94 (2005) 011301
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, revtex4, one figure. Only e-print archive numbers correctedi in the second version. Reference added in the 3rd versio
Scientific paper
10.1103/PhysRevLett.94.011301
Non-perturbative corrections from loop quantum cosmology (LQC) to the scalar matter sector is already known to imply inflation. We prove that the LQC modified scalar field generates exponential inflation in the small scale factor regime, for all positive definite potentials, independent of initial conditions and independent of ambiguity parameters. For positive semi-definite potentials it is always possible to choose, without fine tuning, a value of one of the ambiguity parameters such that exponential inflation results, provided zeros of the potential are approached at most as a power law in the scale factor. In conjunction with generic occurrence of bounce at small volumes, particle horizon is absent thus eliminating the horizon problem of the standard Big Bang model.
Date Ghanashyam
Hossain Golam Mortuza
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