60 citations · 426 across the 35 of their papers we have counts for
35 papers
DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity
Andrea Addazi, Yermek Aldabergenov, Daulet Berkimbayev +3
We consider the simplest quadratic extension of MacDowell--Mansouri pre-geometric gravity that preserves the topological pre-volume-form symmetry. Upon symmetry breaking, the theor…
Bouncing cosmologies from Born-Infeld-type gravity
Yermek Aldabergenov, Wei Lin, Rongjian Li +2
We construct a Born-Infeld-type modification of gravity, where is the Gauss-Bonnet term, by embedding Born-Infeld electrodynamics in a five-dimensional p…
Single-field D-type inflation in the minimal supergravity in light of Planck-ACT-SPT data
Yermek Aldabergenov, Sergei V. Ketov
The minimal supergravity framework is applied to a construction of new D-type single-field models of inflation in agreement with precision measurements of the cosmic microwave back…
(Lovelock) inflation: explaining the ACT data and equivalence to Higgs-Gauss-Bonnet inflation
Andrea Addazi, Yermek Aldabergenov, Daulet Berkimbayev +1
We revisit the Starobinsky model of inflation in light of recent data from the Atacama Cosmology Telescope (ACT), which indicates a potential preference for a slightly larger scala…
Domain Wall formation from spontaneous symmetry breaking/restoration in Scalar-Einstein-Gauss-Bonnet theory
Maxim Krasnov, Daulet Berkimbayev, Andrea Addazi +2
This study offers a detailed analysis of domain wall formation and its cosmological consequences in Einstein-Gauss-Bonnet gravity coupled to a scalar field. A central aspect of the…
Towards Stochastic Inflation in Higher-Curvature Gravity
Yermek Aldabergenov, Ding Ding, Wei Lin +1
We study stochastic inflation in the presence of higher-curvature terms non-minimally coupled to the inflaton. Focusing on quadratic curvature invariants, we single out the Gauss-B…
Curvature corrections to Starobinsky inflation can explain the ACT results
Andrea Addazi, Yermek Aldabergenov, Sergei V. Ketov
We investigate the impact of curvature corrections to Starobinsky inflation in light of the latest observational results from the Atacama Cosmology Telescope (ACT). While the pure…
Gauss-Bonnet-induced symmetry breaking/restoration during inflation
Yermek Aldabergenov, Daulet Berkimbayev
We propose a mechanism of symmetry breaking or restoration that can occur in the middle of inflation due to the coupling of the Gauss-Bonnet term to a charged scalar. The Gauss-Bon…
Sound Speed Resonance of Gravitational Waves in Gauss-Bonnet-coupled inflation
Andrea Addazi, Yermek Aldabergenov, Yifu Cai
We demonstrate the occurrence of Sound Speed Resonances (SSR) in Gauss-Bonnet-coupled inflation across a wide range of coupling functions and parameters. After inflation, the dampe…
Meso-inflationary Peccei-Quinn symmetry breaking with non-minimal coupling
Yermek Aldabergenov, Ding Ding, Wei Lin +1
We study a realization of the inflationary scenario where the Peccei-Quinn (PQ) symmetry is spontaneously broken during inflation, facilitated by its non-minimal coupling to gravit…
Hybrid inflation from supersymmetry breaking
Yermek Aldabergenov, Ignatios Antoniadis, Auttakit Chatrabhuti +1
We extend a recently proposed framework, dubbed inflation by supersymmetry breaking, to hybrid inflation by introducing a waterfall field that allows to decouple the supersymmetry…
Aspects of cubic nilpotent superfields
Yermek Aldabergenov, Ignatios Antoniadis, Auttakit Chatrabhuti +1
We study in more detail the cubic constraints for N=1 chiral superfields proposed in the earlier work Eur. Phys. J. C 81, 523 (2021), which describe low-energy goldstino-axion dyna…
Primordial black holes from Volkov-Akulov-Starobinsky supergravity
Yermek Aldabergenov, Sergei V. Ketov
We study the formation of primordial black holes (PBH) in the Starobinsky supergravity coupled to the nilpotent superfield describing Volkov-Akulov goldstino. By using the no-scale…
More on gravitational waves from double monodromy inflation
Medeu Abishev, Aigerim Abylayeva, Andrea Addazi +2
We further analyze phenomenological implications of double axion monodromy inflation proposed in Ref. Phys. Rev. D 104, L081302 (2021), in gravitational wave physics. We show that…
Inflation, SUSY breaking, and primordial black holes in modified supergravity coupled to chiral matter
Yermek Aldabergenov, Andrea Addazi, Sergei V. Ketov
We propose a novel model of the modified (Starobinsky-like) old-minimal-type supergravity coupled to a chiral matter superfield, that can {\it simultaneously} describe multi-field…
Gauging the R-symmetry of old-minimal supergravity
Yermek Aldabergenov
Old-minimal supergravity has a R-symmetry which rotates the chiral curvature superfield. We gauge this R-symmetry and study new interactions involving the gauge mult…
Quintic constraints for multiplets and complete SUSY breaking
Yermek Aldabergenov, Ignatios Antoniadis, Auttakit Chatrabhuti +1
We study real fifth-order superfield constraint for vector (and tensor) multiplet and derive most general solution describing complete supersymmetry breaking, and pres…
Reheating after inflation by supersymmetry breaking
Yermek Aldabergenov, Ignatios Antoniadis, Auttakit Chatrabhuti +1
We study reheating after the end of inflation in models where the inflaton is the superpartner of goldstino and is charged under a gauged R-symmetry. We consider two classes…
Nilpotent superfields for broken abelian symmetries
Yermek Aldabergenov, Auttakit Chatrabhuti, Hiroshi Isono
We find new solutions to real cubic constraints on chiral superfields transforming under global abelian symmetries. These solutions describe the low-energy dynamics of a gold…
Testing Primordial Black Holes as Dark Matter in Supergravity from Gravitational Waves
Yermek Aldabergenov, Andrea Addazi, Sergei V. Ketov
We explore the Gravitational Waves (GW) phenomenology of a simple class of supergravity models that can explain and unify inflation and Primordial Black Holes (PBH) as Dark Matter…
Primordial black holes from modified supergravity
Yermek Aldabergenov, Andrea Addazi, Sergei V. Ketov
The modified supergravity approach is applied to describe a formation of Primordial Black Holes (PBHs) after Starobinsky inflation. Our approach naturally leads to the two-(scalar)…
Minimal Starobinsky supergravity coupled to dilaton-axion superfield
Yermek Aldabergenov, Shuntaro Aoki, Sergei V. Ketov
The minimal Starobinsky supergravity with the inflaton (scalaron) and the goldstino in a massive vector supermultiplet is coupled to the dilaton-axion chiral superfield with the no…
Volkov-Akulov-Starobinsky supergravity revisited
Yermek Aldabergenov
We find new realizations of Volkov-Akulov-Starobinsky supergravity, i.e. Starobinsky inflationary models in supergravity coupled to a nilpotent superfield describing Volkov-Akulov…
Aspects of gauged R-symmetry in SU(1,1)/U(1) supergravity
Yermek Aldabergenov
We propose a novel realization of spontaneous supersymmetry breaking in de Sitter vacuum by F- and D-terms in four-dimensional supergravity coupled to a chiral superfield wit…