Letter: Quantum Kaluza-Klein Cosmologies |
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| Authors: | Zhong Chao Wu |
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| Affiliation: | (1) Department of Physics, Beijing Normal University, Beijing, 100875, People's Republic of China |
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| Abstract: | In the No-boundary Universe with d = 11 supergravity, under the Sn × S11–n Kaluza-Klein ansatz, the only seed instanton for the universe creation is a S7 × S4 space. It is proven that for the Freund-Rubin, Englert and Awada-Duff-Pope models the macroscopic universe in which we are living must be 4- instead of 7-dimensional without appealing to the anthropic principle. |
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| Keywords: | Quantum cosmology Kaluza-Klein theory supergravity dimensionality gravitational instanton |
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