
Hartle–Hawking proposal
Proposal concerning the state of the universe prior to the Planck epoch

Proposal concerning the state of the universe prior to the Planck epoch
The Hartle–Hawking state, also known as the no-boundary wave function, is a cosmological model that applies quantum mechanics to the Big Bang. It is named after James Hartle and Stephen Hawking, who first proposed it in 1983. The concept can also be considered as an initial condition for models of quantum cosmology.
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