21 papers
New results concerning the curvature of the Universe
Maxim Khlopov, Maxim Krasnov, Jan Novák
One of the fundamental questions we ask in cosmology is what the spatial curvature of the universe is. Experimental observations show that the universe is very close to being spati…
Accelerating expansion and isotropic sky-hemisphere consistency in Pantheon+ supernovae: a revised analysis in the dark energy debate
Saibal Ray, Maxim Khlopov, Aritra Sanyal +2
We perform four independent decompositions of the deceleration parameter using 1564 Type Ia supernovae (SNe Ia) from the Pantheon+ catalogue: by redshift bin, sky hemisphere,…
Spontaneous baryogenesis with large misalignment
Maxim Krasnov, Ufuk Aydemir, Maxim Khlopov
We investigate particle production by a pseudo-Nambu-Goldstone boson (pNGB) in the spontaneous baryogenesis scenario for large misalignment angles. Since the fermionic backreaction…
Observationally Constrained Cosmological model in Gravity with parameterization
Vinod Kumar Bhardwaj, Maxim Khlopov, Maxim Krasnov +1
In the present work, we explore an observationally constrained cosmological model in the framework of gravity, where denotes the non-metricity scalar and…
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…
Solar System and Atomic Clock Bounds on Locally Coupled Swampland Scalars
Suraj Gavhale, Maxim Khlopov, Oem Trivedi +1
We study how local measurements constrain light scalar fields that are relevant in late time cosmic acceleration and are often discussed in connection with swampland criteria. Star…