Vacuum Energy: If Not Now, Then When?
Abstract
We review the cosmological evidence for a low matter density universe and a cosmological constant or dynamical vacuum energy and address the cosmological coincidence problem: why is the matter density about one-half the vacuum energy now. This is reasonble, following the anthropic argument of Efstathiou and of Martel, Schapiro & Weinberg.
- Publication:
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Nuclear Physics A
- Pub Date:
- January 2000
- DOI:
- 10.1016/S0375-9474(99)00733-2
- arXiv:
- arXiv:astro-ph/9907168
- Bibcode:
- 2000NuPhA.663..865B
- Keywords:
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- Astrophysics
- E-Print:
- 4 pages (latex)