Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Sarunas Verner"'
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 9, Pp 1-36 (2024)
Abstract We investigate the gravitational production of a scalar field χ with a mass exceeding the Hubble scale during inflation m χ ≳ H I , employing both analytical and numerical approaches. We demonstrate that the steepest descent method effec
Externí odkaz:
https://doaj.org/article/e097022ccee04ef8ab669fd27fa2def2
Publikováno v:
Physics Letters B, Vol 856, Iss , Pp 138941- (2024)
Theoretical physicists describe nature by i) building a theory model and ii) determining the model parameters. The latter step involves the dual aspect of both fitting to the existing experimental data and satisfying abstract criteria like beauty, na
Externí odkaz:
https://doaj.org/article/64727e578f624a80a205b4e1b78f7d89
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-44 (2024)
Abstract We explore possible extensions of the Weak Gravity Conjecture (WGC) to scalar field theories. To avoid charged black hole remnants, the WGC requires the existence of a particle with a mass m ≤ gqM P , with charge q and U(1) gauge coupling
Externí odkaz:
https://doaj.org/article/386233e0d3e1411a9bf2242c26c19bab
Autor:
Roy T. Forestano, Konstantin T. Matchev, Katia Matcheva, Alexander Roman, Eyup B. Unlu, Sarunas Verner
Publikováno v:
Physics Letters B, Vol 847, Iss , Pp 138306- (2023)
Deep learning was recently successfully used in deriving symmetry transformations that preserve important physics quantities. Being completely agnostic, these techniques postpone the identification of the discovered symmetries to a later stage. In th
Externí odkaz:
https://doaj.org/article/01b3b6569d594067ba851a0ec0c8c0c4
Autor:
Roy T. Forestano, Konstantin T. Matchev, Katia Matcheva, Alexander Roman, Eyup B. Unlu, Sarunas Verner
Publikováno v:
Physics Letters B, Vol 847, Iss , Pp 138266- (2023)
Recent work has applied supervised deep learning to derive continuous symmetry transformations that preserve the data labels and to obtain the corresponding algebras of symmetry generators. This letter introduces two improved algorithms that signific
Externí odkaz:
https://doaj.org/article/a5b8dda612424f2fbcb937d8f2bc750e
Publikováno v:
Universe, Vol 10, Iss 6, p 239 (2024)
We consider the decay of the inflaton in Starobinsky-like models arising from either an R+R2 theory of gravity or N=1 no-scale supergravity models. If Standard Model matter is simply introduced to the R+R2 theory, the inflaton (which appears when the
Externí odkaz:
https://doaj.org/article/e846c9017f024e2089c34dfe4760be81
Autor:
Roy T. Forestano, Konstantin T. Matchev, Katia Matcheva, Alexander Roman, Eyup B. Unlu, Sarunas Verner
Publikováno v:
Physics Letters B, Vol 844, Iss , Pp 138086- (2023)
Recent work has used deep learning to derive symmetry transformations, which preserve conserved quantities, and to obtain the corresponding algebras of generators. In this letter, we extend this technique to derive sparse representations of arbitrary
Externí odkaz:
https://doaj.org/article/bb46654c087742c58bde546978fdae84
Autor:
Roy T Forestano, Konstantin T Matchev, Katia Matcheva, Alexander Roman, Eyup B Unlu, Sarunas Verner
Publikováno v:
Machine Learning: Science and Technology, Vol 4, Iss 2, p 025027 (2023)
We design a deep-learning algorithm for the discovery and identification of the continuous group of symmetries present in a labeled dataset. We use fully connected neural networks to model the symmetry transformations and the corresponding generators
Externí odkaz:
https://doaj.org/article/2098782f296742879fa7c447dac4f841
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 10, Pp 1-30 (2019)
ABSTRACT We show the uniqueness of superpotentials leading to Minkowski vacua of single-field no-scale supergravity models, and the construction of dS/AdS solutions using pairs of these single-field Minkowski superpotentials. We then extend the const
Externí odkaz:
https://doaj.org/article/d443d21b1e364c5891fd8dc9f4b465e0
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 3, Pp 1-22 (2019)
Abstract Measurements of the cosmic microwave background (CMB) favour models of inflation with a small tensor-to-scalar ratio r, as predicted by the Starobinsky R + R 2 model. It has been shown previously that various models based on no-scale supergr
Externí odkaz:
https://doaj.org/article/5a1d57ef0ae446d9ba48f6c339a342ff