Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1999-01-02
Class.Quant.Grav. 16 (1999) 1349-1356
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Revtex, 4 twocolumn pages, 3 eps figures (accepted for publication in Class. Quan. Grav.)
Scientific paper
10.1088/0264-9381/16/4/023
Within the mini-superspace model, brane-like cosmology means performing the variation with respect to the embedding (Minkowski) time $\tau$ before fixing the cosmic (Einstein) time $t$. The departure from Einstein limit is parameterized by the 'energy' conjugate to $\tau$, and characterized by a classically disconnected Embryonic epoch. In contrast with canonical quantum gravity, the wave-function of the brane-like Universe is (i) $\tau$-dependent, and (ii) vanishes at the Big Bang. Hartle-Hawking and Linde proposals dictate discrete 'energy' levels, whereas Vilenkin proposal resembles $\alpha$-particle disintegration.
Davidson Aharon
Karasik David
Lederer Yoav
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