29 citations · 38 across the 15 of their papers we have counts for
19 papers
Exact black hole solutions with semi-symmetric vectorial torsion
Lehel Csillag, Tiberiu Harko
Semi-Symmetric metric gravity extends general relativity by introducing a semi-symmetric connection with vectorial torsion. The modified field equations contain extra contributions…
Gravitational radiation from binary systems with time varying masses
Teodora M. Matei, Cristian A. Croitoru, Tiberiu Harko
We consider the properties of the gravitational radiation emitted by massive stars in binary systems with time varying mass, orbiting around each other in Keplerian orbits under th…
Scale-invariant Schrödinger geometry in symmetric teleparallel gravity
Wei-Zhi Liu, Jing-Ying Wang, Shi-Dong Liang +3
We construct a locally scale-invariant formulation of Schrödinger geometry in symmetric teleparallel gravity. The unique scale transformation preserving autoparallelism, torsionles…
Constraining Early Dark Energy cosmological models with Big Bang Nucleosynthesis
Teodora M. Matei, Cristian Croitoru, Tiberiu Harko
The recent cosmological picture contains a significant tension indicating that our standard CDM picture may be incomplete. Early Dark Energy models can alleviate the Hubble tens…
Warm inflation in Weyl geometric gravity
Runhua Huang, Tiberiu Harko, Shi-Dong Liang +2
We investigate the warm inflationary scenario in the Weyl geometric gravity theory, in which the action is constructed by adding matter to the simplest conformally invariant gravit…
From dual connections to gravitational field equations -- the curvature and Einstein tensors of the - connection of a quasi-statistical manifold
Rattanasak Hama, Tiberiu Harko, Sorin V. Sabau
We present a detailed review of the mathematical foundations of the theory of the statistical and quasi-statistical manifolds, which recently have found many applications in genera…
Cosmological test of a length-preserving biconnection gravity
Dalale Mhamdi, Amine Bouali, Taoufik Ouali +1
We investigate the cosmological implications of an extended gravitational framework based on biconnection gravity, constructed from the Schrdinger connection and its dual…
Helicity-supported stationary spacetimes: A class of finite-energy, horizonless, axisymmetric solutions
Francisco S. N. Lobo, Tiberiu Harko
We construct a class of stationary, axisymmetric, horizonless spacetimes whose curvature is generated entirely by smooth, localised differential rotation , while the spatial…
Analytic semiclassical backreaction of a Schwarzschild black hole in a finite cavity: horizon shift, temperature renormalization, and canonical stability in the Hartle-Hawking State
G. G. L. Nashed, Alnadhief H. A. Alfedeel, Tiberiu Harko
We construct an analytic model of static semiclassical backreaction for a Schwarzschild black hole in the Hartle--Hawking state enclosed within a finite spherical cavity. Using a m…
Dark energy and accelerating cosmological evolution in a Universe with a Weylian boundary
Tiberiu Harko, Shahab Shahidi
We investigate the influence of boundary terms in gravitational field theories, by considering that in the Einstein-Hilbert action the boundary can be described by a non-metric Wey…
Is Dark Energy Dynamical in the DESI Era? A Critical Review
Salvatore Capozziello, Himanshu Chaudhary, Tiberiu Harko +1
We investigate whether the recent DESI DR2 measurements provide or not evidences for dynamical dark energy by exploring the CDM model and its extensions with free $\sum m_ν…
Schrödinger-type gravity-nonmetricity driven cosmological evolution from inflation to the late Universe
Lei Ming, Himanshu Chaudhary, Shi-Dong Liang +2
We consider an gravity theory with a Schrödinger type vectorial non-metricity. In the presence of such a non-metricity, the length of vectors is preserved under autoparal…
Observational tests of the conformal osculating Barthel-Kropina cosmological model
Himanshu Chaudhary, Rattanasak Hama, Tiberiu Harko +2
We consider detailed cosmological tests of dark energy models obtained from the general conformal transformation of the Kropina metric, representing an -type Finslerian geom…
Herglotz-type gravity
Marek Wazny, Lehel Csillag, Miguel A. S. Pinto +1
The non-conservation of the energy-momentum tensor in gravity can be interpreted as an effective manifestation of dissipation. Motivated by this, we propose a new formulat…
The Weyl Geometric Gravity black hole in light of the Solar System tests
Mohsen Khodadi, Tiberiu Harko
The Weyl geometric gravity theory, in which the gravitational action is constructed from the square of the Weyl curvature scalar and the strength of the Weyl vector, has been inten…
From Barthel Randers Kropina Geometries to the Accelerating Universe: A Brief Review of Recent Advances in Finslerian Cosmology
Amine Bouali, Himanshu Chaudhary, Lehel Csillag +4
We review recent developments in cosmological models based on Finsler geometry and extensions of general relativity within this framework. Finsler geometry generalizes Riemannian g…
f(R, , T) Gravity: Cosmological Implications and Dynamical System Analysis
Ratul Mandal, Himanshu Chaudhary, Tiberiu Harko +2
We consider the cosmological implications of a four-dimensional extension of the Gauss-Bonnet gravity, where is the Gauss-Bonnet topological invariant, in which the Eins…
Semi-Symmetric Metric Gravity: A Brief Overview
Himanshu Chaudhary, Lehel Csillag, Tiberiu Harko
We present a review of the Semi-Symmetric Metric Gravity (SSMG) theory, representing a geometric extension of standard general relativity, based on a connection introduced by Fried…
Dark matter and radiation production during warm inflation in a curved Universe-an irreversible thermodynamic approach
Teodora Matei, Tiberiu Harko, Gabriela Mocanu
We investigate the creation of dark matter particles as a result of the decay of the scalar field in the framework of warm inflationary models, by using the irreversible thermodyna…