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Title: On the classicality of bosonic stars
Author: Herdeiro, Carlos A. R.
Radu, Eugen
Keywords: Boson stars
General relativity
Quantum field theory
Issue Date: 2022
Publisher: World Scientific Publishing
Abstract: Because the Klein–Gordon and Proca equations involve ℏ, they describe quantum fields. Their solutions, however, may be treated as classical if their typical action obeys 𝑆typical≫ℏ. This is possible due to their bosonic nature, allowing states with many particles. We show, by generic arguments, that the typical action for such bosonic stars is 𝒮typical/ℏ≳(𝑀max/𝑀Pl)2∼1076(𝑀max/𝑀⊙)2, where 𝑀max is the maximal bosonic star mass of the particular model and 𝑀Pl is the Planck mass. Thus, for models allowing 𝑀max≫𝑀Pl and for solutions with mass ∼𝑀max, the classical treatment is legitimate, which includes masses in the astrophysical interesting range ≳𝑀⊙.
Peer review: yes
DOI: 10.1142/S0218271822420226
ISSN: 0218-2718
Appears in Collections:CIDMA - Artigos
GGDG - Artigos

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