3 papers
gr-qc2008★ 26 cited
Recollapsing quantum cosmologies and the question of entropy
Martin Bojowald, Reza Tavakol
Recollapsing homogeneous and isotropic models present one of the key ingredients for cyclic scenarios. This is considered here within a quantum cosmological framework in presence o…
astro-ph2008★ 162 cited
Constraints on scalar-tensor models of dark energy from observational and local gravity tests
Shinji Tsujikawa, Kotub Uddin, Shuntaro Mizuno +2
We construct a family of viable scalar-tensor models of dark energy (DE) which possess a phase of late-time acceleration preceded by a standard matter era, while at the same time s…
gr-qc2008★ 12 cited
Loop Quantum Cosmology: Effective theories and oscillating universes
Martin Bojowald, Reza Tavakol
Despite its great successes in accounting for the current observations, the so called `standard' model of cosmology faces a number of fundamental unresolved questions. Paramount am…