Nonlocal gravity and the diffusion equation

Details Nonlocal gravity and the diffusion equation Nonlocal gravity and the diffusion equation

2010-04-28

arxiv.org/abs/1004.5144v2

Phys.Rev.D82:123518,2010

Physics

High Energy Physics

High Energy Physics - Theory

18 pages, 5 figures. v2: typos corrected, references added. Major changes are an expansion of the discussion of homogeneous pe

Scientific paper

10.1103/PhysRevD.82.123518

We propose a nonlocal scalar-tensor model of gravity with pseudodifferential operators inspired by the effective action of p-adic string and string field theory on flat spacetime. An infinite number of derivatives act both on the metric and scalar field sector. The system is localized via the diffusion equation approach and its cosmology is studied. We find several exact dynamical solutions, also in the presence of a barotropic fluid, which are stationary in the diffusion flow. In particular, and contrary to standard general relativity, there exist solutions with exponential and power-law scale factor also in an open universe, as well as solutions with sudden future singularities or a bounce. Also, from the point of view of quantum field theory, spontaneous symmetry breaking can be naturally realized in the class of actions we consider.

Affiliated with

Also associated with

No associations

Rating

Nonlocal gravity and the diffusion equation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nonlocal gravity and the diffusion equation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonlocal gravity and the diffusion equation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-284145