The landscape, the swampland and the era of precision cosmology
We review the advanced version of the KKLT construction and pure de Sitter supergravity,
involving a nilpotent multiplet, with regard to various conjectures that de Sitter state cannot …
involving a nilpotent multiplet, with regard to various conjectures that de Sitter state cannot …
Planck constraints and gravitational wave forecasts for primordial black hole dark matter seeded by multifield inflation
W Qin, SR Geller, S Balaji, E McDonough, DI Kaiser - Physical Review D, 2023 - APS
We perform a Markov Chain Monte Carlo analysis of a simple yet generic multifield inflation
model characterized by two scalar fields coupled to each other and nonminimally coupled to …
model characterized by two scalar fields coupled to each other and nonminimally coupled to …
Primordial black holes from multifield inflation with nonminimal couplings
SR Geller, W Qin, E McDonough, DI Kaiser - Physical Review D, 2022 - APS
Primordial black holes (PBHs) provide an exciting prospect for accounting for dark matter. In
this paper, we consider inflationary models that incorporate realistic features from high …
this paper, we consider inflationary models that incorporate realistic features from high …
Dark energy, α-attractors, and large-scale structure surveys
Over the last few years, a large family of cosmological attractor models has been discovered,
which can successfully match the latest inflation-related observational data. Many of these …
which can successfully match the latest inflation-related observational data. Many of these …
Swampland distance conjecture, inflation and α-attractors
M Scalisi, I Valenzuela - Journal of High Energy Physics, 2019 - Springer
A bstract The Swampland Distance Conjecture (SDC) constraints the dynamics emerging at
infinite distances in field space of any effective field theory consistent with quantum gravity. It …
infinite distances in field space of any effective field theory consistent with quantum gravity. It …
Higher spin supersymmetry at the cosmological collider: sculpting SUSY rilles in the CMB
S Alexander, S James Gates, L Jenks… - Journal of High Energy …, 2019 - Springer
A bstract We study the imprint of higher spin supermultiplets on cosmological correlators,
namely the non-Gaussianity of the cosmic microwave background. Supersymmetry is used …
namely the non-Gaussianity of the cosmic microwave background. Supersymmetry is used …
Catastrophic production of slow gravitinos
We study gravitational particle production of the massive spin-3/2 Rarita-Schwinger field,
and its close relative, the gravitino, in Friedmann-Robertson-Walker cosmological …
and its close relative, the gravitino, in Friedmann-Robertson-Walker cosmological …
[HTML][HTML] Towards early dark energy in string theory
E McDonough, M Scalisi - Journal of High Energy Physics, 2023 - Springer
A bstract Early Dark Energy (EDE) is a prominent model to resolve the Hubble tension,
which employs a dynamical axion with a periodic potential. In this work, we take first steps …
which employs a dynamical axion with a periodic potential. In this work, we take first steps …
Universality of multi-field α-attractors
We study a particular version of the theory of cosmological α-attractors with α= 1/3, in which
both the dilaton (inflaton) field and the axion field are light during inflation. The kinetic terms …
both the dilaton (inflaton) field and the axion field are light during inflation. The kinetic terms …
[HTML][HTML] de Sitter vacua in the string landscape
The late-time behavior of our universe is one of accelerated expansion, or that of a de Sitter
space, and therefore motivates us to look for time-dependent backgrounds. Finding such …
space, and therefore motivates us to look for time-dependent backgrounds. Finding such …