Data di Pubblicazione:
2019
Citazione:
INTEGRABLE MULTIDIMENSIONAL COSMOLOGIES WITH MATTER AND A SCALAR FIELD / M.m. Gengo ; relatore: L. Pizzochero ; coordinatore: V. Mastropietro. DIPARTIMENTO DI MATEMATICA "FEDERIGO ENRIQUES", 2019 Feb 01. 31. ciclo, Anno Accademico 2018. [10.13130/gengo-massimo-manuel_phd2019-02-01].
Abstract:
The thesis discusses some integrable (i.e., explicitly solvable) cosmologies à la Robertson
-Walker, with possibly non zero spatial curvature. In these models, the
content of the universe consists of matter and of a scalar field. The expression
"matter" is used in a broad sense, and includes as a special case the radiation; the
considered matter has pressure p_m and density ϱ_m, related by an equation of state
p_m = w ϱ_m, with w an arbitrary constant (w = 0 in the case of dust; w = 1/d
in the case of a radiation gas). The scalar field is used as a model for the dark
energy content of the universe, refining the standard cosmological constant model.
(We recall the denomination of "quintessence", often used for a scalar field with this
rôle.)
Tipologia IRIS:
Tesi di dottorato
Keywords:
scalar; cosmology; matter; scalar field; integrable system; perfect fluid; radiation; equation of state; dark energy; quintessence; universe
Elenco autori:
M.M. Gengo
Link alla scheda completa: