12 papers
Relational Wigner-Smith Duration in Wheeler-DeWitt Scattering
Daulet Berkimbayev
A closed Friedmann-Lemaitre-Robertson-Walker Wheeler-DeWitt model is formulated as an exact reflection problem. The derivative of its reflection phase defines a relational crossing…
Unknown Unknowns: Model Misspecification in Machine Learning for Physics
Juan Cruz-Martinez, Carolina Cuesta-Lazaro, Alexander Held +1
Machine learning is now a central tool for solving inverse problems in particle physics and astronomy. Models are trained on simulation and deployed on real data, raising the quest…
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…
Strong primordial inhomogeneities of axion-like field in Einstein-Gauss-Bonnet gravity
M. A. Krasnov, D. Z. Berkimbayev, A. Addazi +2
In this paper we consider complex scalar field with Mexican hat potential coupled with Gauss-Bonnet scalar resulting in restored U(1) symmetry at the stage of inflation, correspond…
Regular hairy black holes by gravitational decoupling: Bardeen and Minkowski-core seeds
Daulet Berkimbayev
We construct two families of regular hairy black holes within gravitational decoupling using a fixed exponential deformation profile for an effective tensor-vacuum sector. The firs…
Classical Corrections to Black Hole Entropy II
Daulet Berkimbayev, Martin Blaschke
We reconsider the classical one bit absorption model of black hole growth as a discrete recursion rather than a continuum equation. In this paper, one bit means one elementary abso…