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：2025/11/28
Hartle-Hawking state
（ plural ）
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(physics) A hypothetical state of the universe prior to the Planck epoch, in which time did not exist, only space.
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Hartle-Hawking state
The cosmologist argued that the Hartle-Hawking state could explain why the universe appears smooth and nearly isotropic.
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The cosmologist argued that the Hartle-Hawking state could explain why the universe appears smooth and nearly isotropic.
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