[astro-ph/0510523] Back-Reaction: A Cosmological Panacea
Posted: October 19 2005
Here we have another paper doing the cosmological constant from back-reaction. This time the authors use the suber-Hubble fluctuations in the scalar field rather than gradient terms of energy momentum tensor used previously, so it is a fundamentally different approach.
In the conclusions the authors address the problem of causality by saying it is easy to refute, because "Our formalism is based entirely on the equations of GR, which are generally covariant...", which still leaves me slighlty nervous (previous approaches were also based on covariant GR and turned out to have many problems), but the proposed mechanism is a very interesting possiblity anyway...
In the conclusions the authors address the problem of causality by saying it is easy to refute, because "Our formalism is based entirely on the equations of GR, which are generally covariant...", which still leaves me slighlty nervous (previous approaches were also based on covariant GR and turned out to have many problems), but the proposed mechanism is a very interesting possiblity anyway...