http://arxiv.org/abs/1604.04183
We consider a scheme whereby it is possible to reconcile semi-classical Einstein’s equation with the violation of the conservation of the expectation value of energy-momentum that is associated with dynamical reduction theories of the quantum state for matter. The very interesting out-shot of the formulation is the appearance of a nontrivial contribution to an effective cosmological constant (which is not strictly constant). This opens the possibility of using models for dynamical collapse of the wave function to compute its value. Another interesting implication of our analysis is that tiny violations of energy-momentum conservation with negligible local effects can become very important on cosmological scales at late times.
T. Josset, A. Perez and D. Sudarsky
Fri, 15 Apr 16
28/51
Comments: 8 pages, 2 figures