Dark Energy from Violation of Energy Conservation

Abstract : In this letter, we consider the possibility of reconciling metric theories of gravitation with violation of the conservation of energy-momentum. Under some circumstances, this can be achieved in the context of unimodular gravity, and it leads to the emergence of an effective cosmological constant in Einstein's equation. We specifically investigate two potential sources of energy non-conservation ---non-unitary modifications of quantum mechanics, and phenomenological models motivated by quantum gravity theories with spacetime discreteness at the Planck scale--- and show that such locally negligible phenomena can nevertheless become relevant at the cosmological scale.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2017, 118 (2), pp.021102 <10.1103/PhysRevLett.118.021102>
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-01436608
Contributeur : Alejandro Perez <>
Soumis le : lundi 16 janvier 2017 - 15:47:23
Dernière modification le : jeudi 21 septembre 2017 - 16:57:57

Identifiants

Collections

Citation

Thibaut Josset, Alejandro Perez, Daniel Sudarsky. Dark Energy from Violation of Energy Conservation. Physical Review Letters, American Physical Society, 2017, 118 (2), pp.021102 <10.1103/PhysRevLett.118.021102>. <hal-01436608>

Partager

Métriques

Consultations de la notice

72