Instantaneous vacuum and States of Low Energy for a scalar field in cosmological backgrounds
Abstract
We construct the instantaneous vacuum state for a quantum scalar field coupled to another classical scalar field as described in [1]. We then compare it with the state of low energy constructed for a particular solution. We show that under physically motivated conditions they become very similar.
- Publication:
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arXiv e-prints
- Pub Date:
- March 2023
- DOI:
- arXiv:
- arXiv:2303.18074
- Bibcode:
- 2023arXiv230318074F
- Keywords:
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- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- E-Print:
- 10 pages, 4 figures, contribution to the proceedings of the "Avenues of Quantum Field Theory in Curved Space-time" conference, Genova, September 2022