On the Newtonian limit of emergent NC gravity and long-distance corrections

Physics – High Energy Physics – High Energy Physics - Theory

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

35 pages, 4 figures. V2: Minor corrections and discussion added, published version

Scientific paper

10.1088/1126-6708/2009/12/024

We show how Newtonian gravity emerges on 4-dimensional non-commutative spacetime branes in Yang-Mills matrix models. Large matter clusters such as galaxies are embedded in large-scale harmonic deformations of the space-time brane, which screen gravity for long distances. On shorter scales, the local matter distribution reproduces Newtonian gravity via local deformations of the brane and its metric. The harmonic ``gravity bag'' acts as a halo with effective positive energy density. This leads in particular to a significant enhancement of the orbital velocities around galaxies at large distances compared with the Newtonian case, before dropping to zero as the geometry merges with a Milne-like cosmology. Besides these ``harmonic'' solutions, there is another class of solutions which is more similar to Einstein gravity. Thus the IKKT model provides an accessible candidate for a quantum theory of gravity.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

On the Newtonian limit of emergent NC gravity and long-distance corrections 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 On the Newtonian limit of emergent NC gravity and long-distance corrections, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Newtonian limit of emergent NC gravity and long-distance corrections will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-325517

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.