MASSIVE GRAVITY IN CURVED COSMOLOGICAL BACKGROUNDS
نویسندگان
چکیده
منابع مشابه
Massive Gravity in Ads and Minkowski Backgrounds
I review some interesting features of massive gravity in two maximally symmetric backgrounds: Anti de Sitter space and Minkowski space. While massive gravity in AdS can be seen as a spontaneously broken, UV safe theory, no such interpretation exists yet in the flatspace case. Here, I point out the problems encountered in trying to find such completion, and possible mechanisms to overcome them. ...
متن کاملLorentz Breaking Massive Gravity in Curved Space
A systematic study of the different phases of Lorentz-breaking massive gravity in a curved background is performed. For tensor and vector modes, the analysis is very close to that of Minkowski space. The most interesting results are in the scalar sector where, generically, there are two propagating degrees of freedom (DOF). While in maximally symmetric spaces ghost-like instabilities are inevit...
متن کاملQED2 in Curved Backgrounds
Here we discuss the two dimensional quantum electrodynamics in curved spacetime, especially in the background of some black holes. We first show the existence of some new quantum mechanical solution which has interesting properties. Then for some special black holes we discuss the fermion-black hole scattering problem. The issue of confinement is intimately connected with these solutions and we...
متن کاملStability of cosmological solutions in extended quasidilaton massive gravity
We consider the stability of self-accelerating solutions to extended quasidilaton massive gravity in the presence of matter. By making a second or extended fiducial metric dynamical in this model, matter can cause it to evolve from a Lorentzian to Euclidean signature, triggering a ghost instability. We study this possibility with scalar field matter as it can model a wide range of cosmological ...
متن کاملInstability in cosmological topologically massive gravity at the chiral point
We demonstrate that cosmological topologically massive gravity at the chiral point exhibits a negative energy bulk mode that grows linearly in time. Unless there are physical reasons to discard this mode, this theory is unstable. To address this issue we prove that the mode is not pure gauge and that its negative energy is time-independent and finite. The isometry generators L0 and L̄0 have non-...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2009
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x09043146