Hydrodynamic representation of a cosmic scalar field

Abril Suárez 1 Pierre-Henri Chavanis 1
1 Physique Statistique des Systèmes Complexes (LPT)
LPT - Laboratoire de Physique Théorique - IRSAMC
Abstract : We derive the fluid equations governing the evolution of a cosmic scalar field (e.g. an axion field) described by the Klein-Gordon-Einstein equations in an expanding universe. We consider the nonrelativistic limit where the Klein-Gordon-Einstein equations reduce to the Schrödinger-Poisson or to the Gross-Pitaevskii-Poisson equations. Our quantum hydrodynamic equations generalize the classical hydrodynamic equations of the cold dark matter model by including a quantum force and a pressure force due to the self-interaction of the scalar field. We derive the equation for the density contrast, solve it in the linear regime of small perturbations, and discuss the differences with the cold dark matter model.
Type de document :
Communication dans un congrès
14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 2, pp.2058-2063, 2017, 〈10.1142/9789813226609_0225〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01669848
Contributeur : Inspire Hep <>
Soumis le : jeudi 21 décembre 2017 - 01:10:38
Dernière modification le : mercredi 24 janvier 2018 - 14:04:23

Lien texte intégral

Identifiants

Collections

Citation

Abril Suárez, Pierre-Henri Chavanis. Hydrodynamic representation of a cosmic scalar field. 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 2, pp.2058-2063, 2017, 〈10.1142/9789813226609_0225〉. 〈hal-01669848〉

Partager

Métriques

Consultations de la notice

34