A Lagrangian description of interacting dark energy
| dc.creator | Poplawski, Nikodem J. | |
| dc.date | 2006-08-07 | |
| dc.date | 2006-09-25 | |
| dc.date.accessioned | 2026-07-07T07:20:10Z | |
| dc.date.available | 2026-07-07T07:20:10Z | |
| dc.description | We propose a relativistically covariant model of interacting dark energy based on the principle of least action. The cosmological term $Λ$ in the gravitational Lagrangian is a function of the trace of the energy--momentum tensor $T$. We find that the $Λ(T)$ gravity is more general than the Palatini $f(R)$ gravity, and reduces to the latter if we neglect the pressure of matter. We show that recent cosmological data favor a variable cosmological constant and are consistent with the $Λ(T)$ gravity, without knowing the specific function $Λ(T)$. | |
| dc.description | 14 pages; corrected errors, added comments | |
| dc.identifier | https://arxiv.org/abs/gr-qc/0608031 | |
| dc.identifier | http://arxiv.org/abs/gr-qc/0608031 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/114873 | |
| dc.subject | General Relativity and Quantum Cosmology | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | A Lagrangian description of interacting dark energy | |
| dc.type | text |