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arXiv · 2110.14736

Effects of a Quantum or Classical Scalar Field on the Entanglement Entropy of a Pair of Universes

Samuel Barroso Bellido
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Abstract

Using the formalism of the third quantization in canonical quantum gravity, the entropy of entanglement of a pair of universes created in the multiverse from the vacuum has lately been calculated. Here, we examine the differences between considering a scalar field as quantum or classical on the entanglement entropy of three different pairs: de-Sitter universes, flat stiff matter dominated universes, and closed universes with a scalar field. We find that the entanglement entropy is unchanged, zero, or dependent on the treatment of the scalar field, respectively.

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Samuel Barroso Bellido. 2021-10-27. Effects of a Quantum or Classical Scalar Field on the Entanglement Entropy of a Pair of Universes. https://doi.org/10.1103/physrevd.104.106009

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