| Abstract from DBPedia | Quantum cosmology is the attempt in theoretical physics to develop a quantum theory of the universe. This approach attempts to answer open questions of classical physical cosmology, particularly those related to the first phases of the universe. Classical cosmology is based on Albert Einstein's general theory of relativity (GTR or simply GR) which describes the evolution of the universe very well, as long as you do not approach the Big Bang. It is the gravitational singularity and the Planck time where relativity theory fails to provide what must be demanded of a final theory of space and time. Therefore, a theory is needed that integrates relativity theory and quantum theory. Such an approach is attempted for instance with loop quantum cosmology, loop quantum gravity, string theory and causal set theory. In quantum cosmology, the universe is treated as a wave function instead of classical spacetime.量子宇宙論（りょうしうちゅうろん）とは量子力学によって説明される宇宙論、もしくはそのような取り扱いが必須となる宇宙誕生直後の初期宇宙を扱う宇宙論のこと。 最も簡単なところで相対性理論を正準量子化した、ジョン・ホイーラーとによるホイーラー・ドウィット方程式がある。この理論によればは無からトンネル効果により生成したとされる。しかし方程式に時間が現れない、宇宙の波動関数の確率的解釈など容易に解決できない問題が現れる。 (Source: http://dbpedia.org/resource/Quantum_cosmology) |
