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the Cosmological Constant Problem

the Cosmological Constant Problem. Roland TRIAY Centre de Physique Théorique CNRS Université de Provence. Int. Journ. Mod. Phys. D 14,10,1667 (2005). Nonlinear Cosmological Workshop - NCP (2006) Nice. the Cosmological Constant. “Einstein’s biggest blunder”. Observations Geometrical Status

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the Cosmological Constant Problem

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  1. the Cosmological Constant Problem Roland TRIAY Centre de Physique Théorique CNRS Université de Provence Int. Journ. Mod. Phys. D 14,10,1667 (2005) Nonlinear Cosmological Workshop - NCP (2006) Nice

  2. the Cosmological Constant “Einstein’s biggest blunder” • Observations • Geometrical Status • Modeling Gravitational Structures Prelude

  3. Observations - the 80th • In the past : • Dynamics of galaxies in clusters • Minimum age of the Universe In the 80’s:Hubble diagram (QSOs, BCGs), VLSS (QSOs) (spatially) closed Universe

  4. Observations - Nowadays Nowadays : CMB temperature fluctuations Hubble diagram (SuperNovæ)

  5. Observations-SNa A.G. Riess etalastro-ph/0402512

  6. Observations - Nowadays A.V Filippenko astro-ph/0410609

  7. Face to the L-Problem « The  Cosmological Constant From the Viewpoint of String Th. » E. Witten 2000 « The  Cosmological Constant Problems » S. Weinberg 2000 « The  Cosmological Constant » S. Carrol 2000 « The Case for a Positive Cosmological L-term » V. Sahni, A. Starobinsky 2000 « The  Cosmological Constant and Dark Energy » P.J.E. Peebles, B. Ratra 2002 « On the Casimir Energy Contribution to the Obs. Value of … » I.O Cherednikov 2002 « The  Cosmological Constant Problem » J. W. Moffat 2003 « Cosmological Constant Weight of the Vacuum » T. Padmanabham 2003 …

  8. Status of L- Geometry) The gravitational field and its sources are characterized by Schwarzschild solution - Newton approximation

  9. Dimensional analysis of EE

  10. Modeling gravitational structures (Modified) Newton law • With L : Gravitation becomes repulsive at “large” scale • No L-effect in Solar neighborhood • Small effect in the outerpart of the Galaxy • Intervenes at the edge of LSC • Homogeneity scale

  11. The cosmological Constant Problem The contribution of quantum fluctuations • A similar problem happens when one assumes • Solar neighborhood • Primordial epoch ( Vacuum dominate expansion) Another version of the Cosmological Constant Problem

  12. Understanding the acceleration of the cosmological expansion Rescaling !!! Understanding Quantum Gravity !!!

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