The Cosmological Constant Problems
The Cosmological Constant Problems
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DOI：
10.1007/978-3-662-04587-9_2
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
S. Weinberg
中科院分区：
文献类型：
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作者：
S. Weinberg
旧的宇宙学常数问题是理解为什么真空能量如此之小;新的问题是理解为什么它与现在的质量密度相当。这些问题的几种方法进行审查。精髓对这两个问题都没有帮助;人择学的考虑提供了解决这两个问题的可能性。在具有随机初始值的标量场的理论中，人择原理可能适用于宇宙学常数，但可能不适用于其他任何东西。
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.