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gr-qc2021
Hartle-Hawking's vacuum is full of Vilenkin's universe-antiuniverse pairs
Salvador J. Robles-Pérez
Within the third quantisation formalism, we find solutions of the Wheeler-DeWitt in terms of two sets of modes that can be identified with the Hartle-Hawking's no boundary conditio…
gr-qc2021
Quantum cosmology with third quantisation
Salvador J. Robles-Pérez
We review the canonical quantisation of the geometry of the spacetime in the cases of a simply and a non-simply connected manifold. In the former, we analyse the information contai…