An Approach to the Cosmological Constant Problem(s)
| Autor: | Gordon L. Kane, Anna N. Żytkow, Malcolm J. Perry |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Physics
Inflation (cosmology) Nuclear and High Energy Physics High Energy Physics::Phenomenology Big Rip FOS: Physical sciences Cosmological constant Metric expansion of space Ekpyrotic universe General Relativity and Quantum Cosmology High Energy Physics::Theory High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) De Sitter universe Quantum mechanics Flatness problem Cosmological constant problem |
| Popis: | We propose an approach to explaining why naive large quantum fluctuations are not the right estimate for the cosmological constant. We argue that the universe is in a superposition of many vacua, in such a way that the resulting fluctuations are suppressed by level repulsion to a very small value. The approach combines several aspects of string theory and the early history of the universe, and is only valid if several assumptions hold true. The approach may also explain why the effective cosmological constant reamins small as the universe evolves though several phase transitions. It provides a non-anthropic mechansim leading to a small, non-zero cosmological constant. Talk given at Rencontres de Moriond, 2004 by G.L. Kane |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|