540 citations · 2.4k across the 44 of their papers we have counts for
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Modified gravity approaches to the cosmological constant problem
The FADE Collaboration, Heliudson Bernardo, Benjamin Bose +5
The cosmological constant and its phenomenology remain among the greatest puzzles in theoretical physics. We review how modifications of Einstein's general relativity could allevia…
Generalised scalar-tensor theories and self-tuning
Edmund J. Copeland, Sukhraj Ghataore, Florian Niedermann +1
We explore a family of generalised scalar-tensor theories that exhibit self-tuning to low scale anti de Sitter vacua, even in the presence of a large cosmological constant. We are…
Brane induced gravity: Ghosts and naturalness
Ludwig Eglseer, Florian Niedermann, Robert Schneider
Linear stability of brane induced gravity in two codimensions on a static pure tension background is investigated. The brane is regularized as a ring of finite circumference in ext…
Radially stabilized inflating cosmic strings
Florian Niedermann, Robert Schneider
In General Relativity, cosmic strings are well known to produce a static, locally flat spacetime with a wedge removed. If the tension exceeds a critical value, the deficit angle be…
Cosmology on a cosmic ring
Florian Niedermann, Robert Schneider
We derive the modified Friedmann equations for a generalization of the Dvali-Gabadadze-Porrati (DGP) model in which the brane has one additional compact dimension. The main new fea…
The Universe as a Cosmic String
Florian Niedermann, Robert Schneider, Stefan Hofmann +1
The cosmology of brane induced gravity in six infinite dimensions is investigated. It is shown that a brane with Friedmann-Robertson-Walker symmetries necessarily acts as a source…
Interpretation of the Weyl tensor
Stefan Hofmann, Florian Niedermann, Robert Schneider
According to folklore in general relativity, the Weyl tensor can be decomposed into parts corresponding to Newton-like, incoming and outgoing wavelike field components. It is shown…