Effective particle kinematics from quantum gravity

Particle Kinematics in Hořava-Lifshitz Gravity

We study the deformed kinematics of point particles in the Hořava theory of gravity. This is achieved by considering particles as the optical limit of fields with a generalized Klein-Gordon action. We derive the deformed geodesic equation and study in detail the cases of flat and spherically symmetric (Schwarzschild-like) spacetimes. As the theory is not invariant under local Lorenz transformat...

Deriving particle physics from quantum gravity: a plan

I give a short review of the holographic approach to quantum gravity, with emphasis on its application to deriving the properties of elementary particles.

Quantum Gravity Corrections to Particle Interactions

An heuristic semiclassical procedure that incorporates quantum gravity induced corrections in the description of photons and spin 1/2 fermions is reviewed. Such modifications are calculated in the framework of loop quantum gravity and they arise from the granular structure of space at short distances. The resulting effective theories are described by power counting non-renormalizable actions wh...

Topology, Quantum Gravity and Particle Physics

It is argued that quantum gravity has an interpretation as a topological quantum field theory provided a certain constraint from the path integral measure is respected. The constraint forces us to couple gauge and matter fields to gravity for space time dimensions different from 3. We then discuss possible models which may be relevant to our universe. E-mail: [email protected]

Gravitational-wave probe of effective quantum gravity