• DOI:10.1007/978-3-662-04587-9_2
• Corpus ID: 122740439

The Cosmological Constant Problems

@inproceedings{Weinberg2000TheCC,
  title={The Cosmological Constant Problems},
  author={Steven Weinberg},
  year={2000}
}

• S. Weinberg
• Published 2000
• Physics

The old cosmological constant problem is to understand why the vacuum energy is so small; the new problem is to understand why it is comparable to the present mass density. Several approaches to these problems are reviewed. Quintessence does not help with either; anthropic considerations offer a possibility of solving both. In theories with a scalar field that takes random initial values, the anthropic principle may apply to the cosmological constant, but probably to nothing else.