Matches in SemOpenAlex for { <https://semopenalex.org/work/W4378505276> ?p ?o ?g. }
Showing items 1 to 71 of
71
with 100 items per page.
- W4378505276 abstract "We revisit the cosmic evolution of the energy density of a quantized free scalar field and assess under what conditions the particle production and classical field approximations reproduce its correct value. Because the unrenormalized energy-momentum tensor diverges in the ultraviolet, it is necessary to frame our discussion within an appropriate regularization and renormalization scheme. Pauli-Villars avoids some of the drawbacks of adiabatic subtraction and dimensional regularization and is particularly convenient in this context. In some cases, we can predict the evolution of the energy density irrespectively of the quantum state of the field modes. To further illustrate our results we focus however on the {it in} vacuum, the preferred quantum state singled out by inflation, and explore to what extent the latter determines the subsequent evolution of the energy density regardless of the unknown details of reheating. We contrast this discussion with examples of transitions to radiation domination that avoid some of the problems of the one commonly studied in the literature, and point out some instances in which the particle production or the classical field approximations lead to the incorrect energy density. Along the way, we also elaborate on the connection of our analysis to dynamical dark energy models and axion-like dark matter candidates." @default.
- W4378505276 created "2023-05-27" @default.
- W4378505276 creator A5017781545 @default.
- W4378505276 creator A5056360022 @default.
- W4378505276 date "2023-05-25" @default.
- W4378505276 modified "2023-09-27" @default.
- W4378505276 title "Cosmic Energy Density: Particles, Fields and the Vacuum" @default.
- W4378505276 doi "https://doi.org/10.48550/arxiv.2305.16293" @default.
- W4378505276 hasPublicationYear "2023" @default.
- W4378505276 type Work @default.
- W4378505276 citedByCount "0" @default.
- W4378505276 crossrefType "posted-content" @default.
- W4378505276 hasAuthorship W4378505276A5017781545 @default.
- W4378505276 hasAuthorship W4378505276A5056360022 @default.
- W4378505276 hasBestOaLocation W43785052761 @default.
- W4378505276 hasConcept C109663097 @default.
- W4378505276 hasConcept C110521144 @default.
- W4378505276 hasConcept C115047598 @default.
- W4378505276 hasConcept C121332964 @default.
- W4378505276 hasConcept C121864883 @default.
- W4378505276 hasConcept C154945302 @default.
- W4378505276 hasConcept C166124518 @default.
- W4378505276 hasConcept C172790937 @default.
- W4378505276 hasConcept C191696108 @default.
- W4378505276 hasConcept C207297109 @default.
- W4378505276 hasConcept C26405456 @default.
- W4378505276 hasConcept C2776135515 @default.
- W4378505276 hasConcept C3079626 @default.
- W4378505276 hasConcept C33332235 @default.
- W4378505276 hasConcept C41008148 @default.
- W4378505276 hasConcept C520416788 @default.
- W4378505276 hasConcept C62520636 @default.
- W4378505276 hasConcept C6947382 @default.
- W4378505276 hasConcept C84114770 @default.
- W4378505276 hasConcept C85725439 @default.
- W4378505276 hasConceptScore W4378505276C109663097 @default.
- W4378505276 hasConceptScore W4378505276C110521144 @default.
- W4378505276 hasConceptScore W4378505276C115047598 @default.
- W4378505276 hasConceptScore W4378505276C121332964 @default.
- W4378505276 hasConceptScore W4378505276C121864883 @default.
- W4378505276 hasConceptScore W4378505276C154945302 @default.
- W4378505276 hasConceptScore W4378505276C166124518 @default.
- W4378505276 hasConceptScore W4378505276C172790937 @default.
- W4378505276 hasConceptScore W4378505276C191696108 @default.
- W4378505276 hasConceptScore W4378505276C207297109 @default.
- W4378505276 hasConceptScore W4378505276C26405456 @default.
- W4378505276 hasConceptScore W4378505276C2776135515 @default.
- W4378505276 hasConceptScore W4378505276C3079626 @default.
- W4378505276 hasConceptScore W4378505276C33332235 @default.
- W4378505276 hasConceptScore W4378505276C41008148 @default.
- W4378505276 hasConceptScore W4378505276C520416788 @default.
- W4378505276 hasConceptScore W4378505276C62520636 @default.
- W4378505276 hasConceptScore W4378505276C6947382 @default.
- W4378505276 hasConceptScore W4378505276C84114770 @default.
- W4378505276 hasConceptScore W4378505276C85725439 @default.
- W4378505276 hasLocation W43785052761 @default.
- W4378505276 hasOpenAccess W4378505276 @default.
- W4378505276 hasPrimaryLocation W43785052761 @default.
- W4378505276 hasRelatedWork W2044608355 @default.
- W4378505276 hasRelatedWork W2047799374 @default.
- W4378505276 hasRelatedWork W2082848899 @default.
- W4378505276 hasRelatedWork W2107985552 @default.
- W4378505276 hasRelatedWork W2137553057 @default.
- W4378505276 hasRelatedWork W2483872723 @default.
- W4378505276 hasRelatedWork W2787352581 @default.
- W4378505276 hasRelatedWork W2962996288 @default.
- W4378505276 hasRelatedWork W3000920535 @default.
- W4378505276 hasRelatedWork W4300795305 @default.
- W4378505276 isParatext "false" @default.
- W4378505276 isRetracted "false" @default.
- W4378505276 workType "article" @default.