%0 Generic %1 Zimdahl2008 %A Zimdahl, Winfried %D 2008 %K Dark Energy Inflation Matter %T Accelerated expansion through interaction %U http://arxiv.org/abs/0812.2292 %X Interactions between dark matter and dark energy with a given equation of state are known to modify the cosmic dynamics. On the other hand, the strength of these interactions is subject to strong observational constraints. Here we discuss a model in which the transition from decelerated to accelerated expansion of the Universe arises as a pure interaction phenomenon. Various cosmological scenarios that describe a present stage of accelerated expansion, like the LCDM model or a (generalized) Chaplygin gas, follow as special cases for different interaction rates. This unifying view on the homogeneous and isotropic background level is accompanied by a non-adiabatic perturbation dynamics which can be seen as a consequence of a fluctuating interaction rate.

@misc{Zimdahl2008, abstract = { Interactions between dark matter and dark energy with a given equation of state are known to modify the cosmic dynamics. On the other hand, the strength of these interactions is subject to strong observational constraints. Here we discuss a model in which the transition from decelerated to accelerated expansion of the Universe arises as a pure interaction phenomenon. Various cosmological scenarios that describe a present stage of accelerated expansion, like the LCDM model or a (generalized) Chaplygin gas, follow as special cases for different interaction rates. This unifying view on the homogeneous and isotropic background level is accompanied by a non-adiabatic perturbation dynamics which can be seen as a consequence of a fluctuating interaction rate. }, added-at = {2008-12-15T12:10:03.000+0100}, author = {Zimdahl, Winfried}, biburl = {https://www.bibsonomy.org/bibtex/235068c627f523069d4e8aff09ba3eeb2/ad4}, description = {Accelerated expansion through interaction}, interhash = {edf89a71f797aed03362c4791ab6be5d}, intrahash = {35068c627f523069d4e8aff09ba3eeb2}, keywords = {Dark Energy Inflation Matter}, note = {cite arxiv:0812.2292 Comment: 4 pages, to appear in the Proceedings of the Spanish Relativity Meeting ERE2008 in Salamanca, September 2008}, timestamp = {2008-12-15T12:10:04.000+0100}, title = {Accelerated expansion through interaction}, url = {http://arxiv.org/abs/0812.2292}, year = 2008 }