Publications (77)
Two-dimensional Lorentz invariance of spherically symmetric black holes
Lam Hui, Alberto Nicolis
We show that a static spherically symmetric black hole, in a generic theory of gravity with generic matter fields, has a two-dimensional Lorentz symmetry.
Wess-Zumino Terms for Relativistic Fluids, Superfluids, Solids, and Supersolids
Luca V. Delacrétaz, Alberto Nicolis, Riccardo Penco +1
We use the coset construction of low-energy effective actions to systematically derive Wess-Zumino (WZ) terms for fluid and isotropic solid systems in two, three and four spacetime…
A no-hair theorem for the galileon
Lam Hui, Alberto Nicolis
We consider a galileon field coupled to gravity. The standard no-hair theorems do not apply, because of the galileon's peculiar derivative interactions. We prove that, nonetheless,…
Primordial Non-Gaussianity
P. Daniel Meerburg, Daniel Green, Muntazir Abidi +175
Our current understanding of the Universe is established through the pristine measurements of structure in the cosmic microwave background (CMB) and the distribution and shapes of…
Classical and Quantum Consistency of the DGP Model
Alberto Nicolis, Riccardo Rattazzi
We study the Dvali-Gabadadze-Porrati model by the method of the boundary effective action. The truncation of this action to the bending mode Ïconsistently describes physics in a w…
Equivalence Principle Implications of Modified Gravity Models
Lam Hui, Alberto Nicolis, Christopher Stubbs
Theories that attempt to explain the observed cosmic acceleration by modifying general relativity all introduce a new scalar degree of freedom that is active on large scales, but i…