Instantaneous vacuum and States of Low Energy for a scalar field in cosmological backgrounds

2023/03/31 by Ferreiro, Antonio, Pla, Silvia
#FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.2303.18074

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.

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