249 citations
- Université de SherbrookeCA5 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TriesteIT2 papers
- Northeastern UniversityUS2 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT2 papers
- Swinburne University of TechnologyAU2 papers
- Université de MontréalCA2 papers
- University of BolognaIT2 papers
- University of TriesteIT2 papers
- Academy of AthensGR1 paper
- Carnegie Mellon UniversityUS1 paper
- Centre National de la Recherche ScientifiqueFR1 paper
- Chinese Academy of SciencesCN1 paper
6 papers · 1 filter
Scalar field mass in generalized gravity
Valerio Faraoni
The notions of mass and range of a Brans-Dicke-like scalar field in scalar-tensor and f(R) gravity are subject to an ambiguity that hides a potential trap. We spell out this ambigu…
Averaging inhomogeneities in scalar-tensor cosmology
Vincenzo Vitagliano, Stefano Liberati, Valerio Faraoni
The backreaction of inhomogeneities on the cosmic dynamics is studied in the context of scalar-tensor gravity. Due to terms of indefinite sign in the non-canonical effective energy…
3D scalar model as a 4D perfect conductor limit: dimensional reduction and variational boundary conditions
A. Edery, N. Graham, I. MacDonald
Under dimensional reduction, a system in D spacetime dimensions will not necessarily yield its D-1-dimensional analog version. Among other things, this result will depend on the bo…
The Size, Shape and Orientation of Cosmological Voids in the Sloan Digital Sky Survey
Caroline Foster, Lorne A. Nelson
We present a detailed description of our void finding algorithm which is an extension of the prescription by Hoyle and Vogeley (2002). We include a discussion of the reproducibilit…
Gentle algebras arising from surface triangulations
Ibrahim Assem, Thomas Brüstle, Gabrielle Charbonneau-Jodoin +1
In this paper, we associate an algebra A(T) to a triangulation T of a surface S with a set of boundary marking points. This algebra A(T) is gentle and Gorenstein of dimension one.…
Gravitationally coupled magnetic monopole and conformal symmetry breaking
Ariel Edery, Luca Fabbri, M. B. Paranjape
We consider a Georgi-Glashow model conformally coupled to gravity. The conformally invariant action includes a triplet of scalar fields and SO(3) non-Abelian gauge fields. However,…