556 citations · 1.7k across the 16 of their papers we have counts for
17 papers
Evolving Dark Sector and the Dark Dimension Scenario
Alek Bedroya, Georges Obied, Cumrun Vafa +1
String theory naturally leads to the expectation that dark energy is not stable, and may be evolving as captured by the Swampland de Sitter conjectures. Moreover, motivated by the…
Dark Dimension and Decaying Dark Matter Gravitons
Georges Obied, Cora Dvorkin, Eduardo Gonzalo +1
We explore the cosmology of the Dark Dimension scenario taking into account perturbations in the linear regime. In the context of the Dark Dimension scenario, a natural candidate f…
Astrophysical Constraints on Decaying Dark Gravitons
Jamie A. P. Law-Smith, Georges Obied, Anirudh Prabhu +1
In the dark dimension scenario, which predicts an extra dimension of micron scale, dark gravitons (KK modes) are a natural dark matter candidate. In this paper, we study observable…
Dark Dimension Gravitons as Dark Matter
Eduardo Gonzalo, Miguel Montero, Georges Obied +1
We consider cosmological aspects of the Dark Dimension (a mesoscopic dimension of micron scale), which has recently been proposed as the unique corner of the quantum gravity landsc…
Swampland Bounds on Dark Sectors
Miguel Montero, Julian B. Muñoz, Georges Obied
We use Swampland principles to theoretically disfavor regions of the parameter space of dark matter and other darkly charged particles that may exist. The Festina Lente bound, the…
A Tale of Two 's: Kinetic Mixing from Lattice WGC States
Georges Obied, Aditya Parikh
We point out that the states required by the Lattice Weak Gravity Conjecture, along with certain genericity conditions, imply the existence of non-vanishing kinetic mixing between…
Topological Gravity as the Early Phase of Our Universe
Prateek Agrawal, Sergei Gukov, Georges Obied +1
Motivated by string dualities we propose topological gravity as the early phase of our universe. The topological nature of this phase naturally leads to the explanation of many of…
CMB-S4 Decadal Survey APC White Paper
Kevork Abazajian, Graeme Addison, Peter Adshead +222
We provide an overview of the science case, instrument configuration and project plan for the next-generation ground-based cosmic microwave background experiment CMB-S4, for consid…
CMB-S4 Science Case, Reference Design, and Project Plan
Kevork Abazajian, Graeme Addison, Peter Adshead +222
We present the science case, reference design, and project plan for the Stage-4 ground-based cosmic microwave background experiment CMB-S4.
Tension, Swampland Conjectures and the Epoch of Fading Dark Matter
Prateek Agrawal, Georges Obied, Cumrun Vafa
Motivated by the swampland dS conjecture, we consider a rolling scalar field as the source of dark energy. Furthermore, the swampland distance conjecture suggests that the rolling…
Dark Energy and the Refined de Sitter Conjecture
Prateek Agrawal, Georges Obied
We revisit the phenomenology of quintessence models in light of the recently refined version of the de Sitter Swampland conjecture, which includes the possibility of unstable de Si…
On the Cosmological Implications of the String Swampland
Prateek Agrawal, Georges Obied, Paul J. Steinhardt +1
We study constraints imposed by two proposed string Swampland criteria on cosmology. These criteria involve an upper bound on the range traversed by scalar fields as well as a lowe…
De Sitter Space and the Swampland
Georges Obied, Hirosi Ooguri, Lev Spodyneiko +1
It has been notoriously difficult to construct a meta-stable de Sitter (dS) vacuum in string theory in a controlled approximation. This suggests the possibility that meta-stable dS…
Inflationary vs. Reionization Features from Planck 2015 Data
Georges Obied, Cora Dvorkin, Chen Heinrich +2
Features during inflation and reionization leave corresponding features in the temperature and polarization power spectra that could potentially explain anomalies in the Planck 201…
Inflationary Features and Shifts in Cosmological Parameters from Planck 2015 Data
Georges Obied, Cora Dvorkin, Chen Heinrich +2
We explore the relationship between features in the Planck 2015 temperature and polarization data, shifts in the cosmological parameters, and features from inflation. Residuals in…
Towards a comprehensive picture of powerful quasars, their host galaxies and quasar winds at z ~ 0.5
Dominika Wylezalek, Nadia L. Zakamska, Guilin Liu +1
Luminous type-2 quasars in which the glow from the central black hole is obscured by dust are ideal targets for studying their host galaxies and the quasars' effect on galaxy evolu…
Giant scattering cones in obscured quasars
Georges Obied, Nadia L. Zakamska, Dominika Wylezalek +1
We analyze Hubble Space Telescope observations of scattering regions in 20 luminous obscured quasars at (11 new observations and 9 archival ones) observed at rest-fra…