Modifying Gravity in the Infra-Red by imposing an "Ultra-Strong" Equivalence Principle

Details Modifying Gravity in the Infra-Red by imposing an "Ultra-Strong" Equivalence Principle Modifying Gravity in the Infra-Red by imposing an "Ultra-Strong" Equivalence Principle

2009-04-28

arxiv.org/abs/0904.4299v2

Int.J.Mod.Phys.D18:2181,2009

Physics

High Energy Physics

High Energy Physics - Theory

9 pages, Honorable Mention at the Gravity Research Foundation Essay Competition

Scientific paper

10.1142/S0218271809016065

The equivalence principle suggests to consider gravity as an infra-red phenomenon, whose effects are visible only outside Einstein's free-falling elevator. By curving spacetime, General Relativity leaves the smallest systems free of classical gravitational effects. However, according to the standard semi-classical treatment, indirect effects of gravity can be experienced inside the elevator through the well-known mechanism of quantum particle production. Here we try a different path than the one historically followed: rather than imposing field quantization on top of a curved manifold, we attempt to upgrade the equivalence principle and extend it to the quantum phenomena. Therefore, we consider, and try to realize in a theoretical framework, a stronger version of the equivalence principle, in which all the effects of gravity are definitely banned from the elevator and confined to the infra-red. For this purpose, we introduce infra-red modified commutation relations for the global field operators (Fourier modes) that allow to reabsorb the time-dependent quadratic divergence of the vacuum expectation value of the stress-energy tensor. The proposed modification is effective on length scales comparable to the inverse curvature and, therefore, does no add any dimensional parameter to the theory.

Affiliated with

Also associated with

No associations

Rating

Modifying Gravity in the Infra-Red by imposing an "Ultra-Strong" Equivalence Principle 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 Modifying Gravity in the Infra-Red by imposing an "Ultra-Strong" Equivalence Principle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modifying Gravity in the Infra-Red by imposing an "Ultra-Strong" Equivalence Principle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-712734