34 citations · 34 across the 1 of their papers we have counts for
5 papers
Revisiting the cuscuton as a Lorentz-violating gravity theory
Jishnu Bhattacharyya, Andrew Coates, Mattia Colombo +2
The cuscuton is a scalar field with infinite speed of propagation. It was introduced in the context of cosmology but it has also been claimed to resemble Horava gravity in a certai…
The uninvited guest in mixed derivative Hořava Gravity
Andrew Coates, Mattia Colombo, A. Emir Gumrukcuoglu +1
We revisit the mixed derivative extension of Hořava gravity which was designed to address the naturalness problems of the standard theory in the presence of matter couplings. We co…
Evolution and spherical collapse in Einstein-aether theory and Horava gravity
Jishnu Bhattacharyya, Andrew Coates, Mattia Colombo +1
We compare the initial value formulation of the low-energy limit of (non-projectable) Horava gravity to that of Einstein-aether theory when the aether is assumed to be hypersurface…
Causality and black holes in spacetimes with a preferred foliation
Jishnu Bhattacharyya, Mattia Colombo, Thomas P. Sotiriou
We develop a framework that facilitates the study of the causal structure of spacetimes with a causally preferred foliation. Such spacetimes may arise as solutions of Lorentz-viola…
Horava Gravity with Mixed Derivative Terms: Power-Counting Renormalizability with Lower-Order Dispersions
Mattia Colombo, A. Emir Gumrukcuoglu, Thomas P. Sotiriou
It has been argued that Horava gravity needs to be extended to include terms that mix spatial and time derivatives in order avoid unacceptable violations of Lorentz invariance in t…