“Yousef Bisabr”

Tel:  +98 21 22931005
Fax:  +98 21 22931005

IPM Positions

Non Resident Researcher, School of Physics
(2003 - 2004 )

Non IPM Affiliations

Assistant Professor of Shahid Rajaee University

Research Interests

Cosmology and Physics of Early Universe , Quantum Cosmology, Quantum Gravity

Research Activities

We investigate a conformal invariant gravitational model which is taken to hold at pre-inflationary ara. The conformal invariance allows to make a dynamical distinction between the two unit systems usually used in cosmology and elementary particle physics. At late times this model provides a machanism which makes a large effective cosmological constant relax to a sufficiently small value. It also consider the conformed factor as a ruintessance field that causes the universe to accererate.

Present Research Project at IPM

Conformal Invariance and the Cosmological Constant Problem

Related Papers

1. Y. Bisabr
Mach's Principle and Model for a Broken Symmetric Theory of Gravity
 (Preprint) [abstract]
arXive.org link: gr-qc/0302102 [ abs, src, ps, others], cited by
Code: IPM/P-2003/099
2. Y. Bisabr
Conformal Invariance, Accelerating Universe and the Cosmological Constant Problem
 (Preprint) [abstract]
arXive.org link: hep-th/0306192 [ abs, src, ps, others], cited by
Code: IPM/P-2003/100
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