SecondPeriodProjectB10 - TransRegio

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Non-locality and Dark Energy

Principal Investigators: V. Mukhanov, I. Sachs (LMU Munich)


Certain covariantly consistent infrared modifications of the Einstein equations have the potential of explaining late time cosmological expansion since they interpolate between the Planck scale of the gravitational coupling constant and the long distance gravitational constant. Such modifications can arise from non-local contributions to the effective action for the gravitational field. While non-locality is a generic feature of quantum fields coupled to classical gravity this does not imply that any such model will be relevant for late time acceleration. The crucial question is whether one is able to extract the terms that are relevant for late time acceleration or Dark Energy. This is the focus of the project described here.

Role within the Transregional Collaborative Research Centre

A close interaction with the projects A1, A2, A3, A6 is anticipated. We will make predictions that can be tested in B3 and B5.
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