Applied Mathematics: Cosmology, General Theory of Relativity, Modified gravity theories.
17
Scopus Publications
980
Scholar Citations
15
Scholar h-index
16
Scholar i10-index
Scopus Publications
Periodic cosmic evolution in f(Q) gravity formalism Parbati Sahoo, Avik De, Tee-How Loo, P K Sahoo Communications in Theoretical Physics, 2022 We study the periodic cosmic transit behavior of the accelerated universe in the framework of symmetric teleparallelism. The exact solution of field equations is obtained by employing a well-known deceleration parameter (DP) called periodic varying DP, q = m cos kt − 1 . The viability and physical reliability of the DP are studied by using observational constraints. The dynamics of periodicity and singularity are addressed in detail with respect to time and redshift parameter. Several energy conditions are discussed in this setting.
New solution generating algorithm for isotropic static Einstein-Gauss-Bonnet metrics Sunil D. Maharaj, Sudan Hansraj, Parbati Sahoo European Physical Journal C, 2021 The static isotropic gravitational field equation, governing the geometry and dynamics of stellar structure, is considered in Einstein–Gauss–Bonnet (EGB) gravity. This is a nonlinear Abelian differential equation which generalizes the simpler general relativistic pressure isotropy condition. A gravitational potential decomposition is postulated in order to generate new exact solutions from known solutions. The conditions for a successful integration are examined. Remarkably we generate a new exact solution to the Abelian equation from the well known Schwarzschild interior seed metric. The metric potentials are given in terms of elementary functions. A physical analysis of the model is performed in five and six spacetime dimensions. It is shown that the six-dimensional case is physically more reasonable and is consistent with the conditions restricting the physics of realistic stars.
Traversable wormholes in the traceless f (R, T) gravity Parbati Sahoo, P. H. R. S. Moraes, Marcelo M. Lapola, P. K. Sahoo International Journal of Modern Physics D, 2021 Wormholes are tunnels connecting different regions in spacetime. They were obtained originally as a solution for Einstein’s General Theory of Relativity and according to this theory they need to be filled by an exotic kind of anisotropic matter. In the present sense, by “exotic matter” we mean matter that does not satisfy the energy conditions. In this paper, we propose the modeling of traversable wormholes (i.e. wormholes that can be safely crossed) within an alternative gravity theory that proposes an extra material (rather than geometrical) term in its gravitational action, namely the traceless [Formula: see text] theory of gravitation, with [Formula: see text] and [Formula: see text] being, respectively, the Ricci scalar and trace of the energy–momentum tensor. Our solutions are obtained from well-known particular cases of the wormhole metric potentials, namely redshift and shape functions. In possession of the solutions for the wormhole material content, we also apply the energy conditions to them. The features of those are carefully discussed.
Bouncing scenario in f (R, T) gravity Parbati Sahoo, Snehasish Bhattacharjee, S. K. Tripathy, P. K. Sahoo Modern Physics Letters A, 2020 This paper presents modeling of matter bounce in the framework of [Formula: see text] gravity, where [Formula: see text]. We start by defining a parametrization of scale factor which is non-vanishing. The geometrical parameters such as the Hubble parameter and deceleration parameter are derived, from which expressions of pressure, density and Equation of State (EoS) parameter and a qualitative understanding of the initial conditions of the universe at the bounce are ascertained. We found that the initial conditions of the universe are finite owing to the non-vanishing nature of the scale factor thus eliminates the initial singularity problem. Furthermore, we show the violation of energy conditions near the bouncing region and analyze the stability of our model with respect to linear homogeneous perturbations in Friedmann–Lemaître–Robertson–Walker (FLRW) spacetime. We found that our model and hence matter bounce scenarios in general are highly unstable at the bounce in the framework of [Formula: see text] gravity but the perturbations decay out rapidly away from the bounce safeguarding its stability at late-times.
Mixed fluid cosmological model in f(R, t) gravity Parbati Sahoo, Barkha Taori, K.L. Mahanta Canadian Journal of Physics, 2020 We construct a locally rotationally symmetric (LRS) Bianchi type-I cosmological model in f(R, T) theory of gravity when the source of gravitation is a mixture of barotropic fluid and dark energy (DE) by employing a time-varying deceleration parameter. We observe through the behavior of the state finder parameters (r, s) that our model begins from the Einstein static era and goes to ΛCDM era. The equation of state (EOS) parameter (ωd) for DE varies from the phantom (ω < –1) phase to quintessence (ω > –1) phase, which is consistent with observational results. It is found that the discussed model can reproduce the current accelerating phase of the expansion of the universe.
Phantom fluid wormhole in f (R, T) gravity Parbati Sahoo, Annika Kirschner, P. K. Sahoo Modern Physics Letters A, 2019 Wormholes (WHs) are considered as hypothetical shortcuts or tunnels in spacetime. In general relativity (GR), the fundamental ingredient of WH geometry is the presence of exotic matter at the throat, which is responsible for the violation of null energy condition (NEC). However, the modified gravity theories have shown to be able to provide WH solutions satisfying energy conditions (ECs). In this paper, we study the static spherically symmetric WH solutions in modified [Formula: see text] gravity for a phantom fluid case. The exact solutions of this model are obtained through the equation of state (EoS), [Formula: see text], associated with phantom dark energy (DE) [Formula: see text]. We find the existence of spherically symmetric WH solution supported by phantom energy distribution. The shape function of the WH obtained in this model obeys all the WH metric conditions. In modified gravity scenario, the phantom fluid WH violates the NEC in radial case, unlike in the tangential case. Furthermore, using the “volume integral quantifier” (VIQ) method, the total amount of EC violating matter in spacetime is discussed briefly.
Phantom energy-dominated universe as a transient stage in f (R) cosmology P. H. R. S. Moraes, P. K. Sahoo, Barkha Taori, Parbati Sahoo International Journal of Modern Physics D, 2019 The [Formula: see text] theories of gravity are the most popular, simple and well-succeeded extension of Einstein’s General Relativity. They can account for some observational issues of standard cosmology with no need for evoking the dark sector of the universe. In the present paper, we will investigate LRS Bianchi type-I spacetime in [Formula: see text] gravity theory within the phantom energy-dominated era. We show that in this formalism the phantom energy-dominated universe is a transient stage and in the further stage of the universe dynamics, it is dominated, once again, by dark energy. Such an important feature is obtained from the model, rather than imposed to it, and may have a relation to loop quantum cosmology.
Phantom fluid supporting traversable wormholes in alternative gravity with extra material terms P. K. Sahoo, P. H. R. S. Moraes, Parbati Sahoo, G. Ribeiro International Journal of Modern Physics D, 2018 Wormholes are tunnels connecting different regions in spacetime. They were obtained originally as a solution for Einstein’s General Relativity theory and according to this theory, they need to be filled by an exotic kind of anisotropic matter. In the present sense, by “exotic matter”, we mean matter that does not satisfy the energy conditions. In this paper, we propose the modeling of wormholes within an alternative gravity theory that proposes an extra material (rather than geometrical) term in its gravitational action. Our solutions are obtained from well-known particular cases of the wormhole metric potentials, named redshift and shape functions, and yield the wormholes to be filled by a phantom fluid, that is, a fluid with equation of state parameter [Formula: see text]. In possession of the solutions for the wormhole material content, we also apply the energy conditions to them. The features of those are carefully discussed.
A Bayesian Statistical Study of Bianchi Type-I Universe in Modified Gravity M Thakre, PK Dhankar, S Islam, P Sahoo, F Rahaman, B Pourhassan arXiv preprint arXiv:2601.03116 , 2026 2026
Study of Accelerated Expansion of Universe in the framework of Gravity P Sahoo arXiv preprint arXiv:2507.19826 , 2025 2025
A New Way to Construct Wormholes in Modified Gravity P Sahoo, S Mandal, PK Sahoo Current Perspective to Physical Science Research Vol. 8, 32-44 , 2024 2024
Periodic cosmic evolution in f ( Q ) gravity formalism P Sahoo, A De, TH Loo, PK Sahoo Communications in Theoretical Physics 74 (12), 125402 , 2022 2022 Citations: 22
New solution generating algorithm for isotropic static Einstein-Gauss-Bonnet metrics SD Maharaj, S Hansraj, P Sahoo The European Physical Journal C 81 (12), 1113 , 2021 2021 Citations: 15
Traversable wormholes in the traceless gravity P Sahoo, P Moraes, MM Lapola, PK Sahoo International Journal of Modern Physics D 30 (13), 2150100 , 2021 2021 Citations: 38
Wormhole model with a hybrid shape function in f (R, T) gravity P Sahoo, S Mandal, PK Sahoo New Astronomy 80, 101421 , 2020 2020 Citations: 54
Bouncing scenario in gravity P Sahoo, S Bhattacharjee, SK Tripathy, PK Sahoo Modern Physics Letters A 35 (13), 2050095 , 2020 2020 Citations: 59
Mixed fluid cosmological model in f ( R , T ) gravity P Sahoo, B Taori, KL Mahanta Canadian Journal of Physics 98 (11), 1015-1022 , 2020 2020 Citations: 9
Phantom fluid wormhole in f ( R , T ) gravity P Sahoo, A Kirschner, PK Sahoo Modern Physics Letters A 34 (37), 1950303 , 2019 2019 Citations: 40
Phantom energy dominated universe as a transient stage in cosmology P Moraes, PK Sahoo, B Taori, P Sahoo arXiv preprint arXiv:1812.03873 , 2018 2018 Citations: 18
A periodic varying deceleration parameter in f ( R , T ) gravity PK Sahoo, SK Tripathy, P Sahoo Modern Physics Letters A 33 (33), 1850193 , 2018 2018 Citations: 90
[Formula omitted] gravity models as alternatives to cosmic acceleration. PK Sahoo, P Moraes, P Sahoo, BK Bishi The European Physical Journal C-Particles and Fields 78 (9), NA-NA , 2018 2018
gravity models as alternatives to cosmic acceleration PK Sahoo, P Moraes, P Sahoo, BK Bishi The European Physical Journal C 78 (9), 736 , 2018 2018 Citations: 47
Phantom fluid supporting traversable wormholes in alternative gravity with extra material terms PK Sahoo, P Moraes, P Sahoo, G Ribeiro International Journal of Modern Physics D 28, 1950004 , 2018 2018 Citations: 76
Magnetized strange quark matter in f (R, T) gravity with bilinear and special form of time varying deceleration parameter PK Sahoo, P Sahoo, BK Bishi, S Aygün New Astronomy 60, 80-87 , 2018 2018 Citations: 59
LRS Bianchi type-I bulk viscous cosmological models in f (R, T) gravity P Sahoo, R Reddy Astrophysics 61 (1), 134-143 , 2018 2018 Citations: 20
Wormholes in -gravity within the f( R, T) formalism PK Sahoo, P Moraes, P Sahoo The European Physical Journal C 78 (1), 46 , 2018 2018 Citations: 156
Magnetized strange quark model with Big Rip singularity in f ( R , T ) gravity PK Sahoo, P Sahoo, BK Bishi, S Aygün Modern Physics Letters A 32 (21), 1750105 , 2017 2017 Citations: 77
Anisotropic cosmological models in gravity with variable deceleration parameter PK Sahoo, P Sahoo, BK Bishi International Journal of Geometric Methods in Modern Physics 14 (06), 1750097 , 2017 2017 Citations: 124
MOST CITED SCHOLAR PUBLICATIONS
Wormholes in -gravity within the f( R, T) formalism PK Sahoo, P Moraes, P Sahoo The European Physical Journal C 78 (1), 46 , 2018 2018 Citations: 156
Anisotropic cosmological models in gravity with variable deceleration parameter PK Sahoo, P Sahoo, BK Bishi International Journal of Geometric Methods in Modern Physics 14 (06), 1750097 , 2017 2017 Citations: 124
A periodic varying deceleration parameter in f ( R , T ) gravity PK Sahoo, SK Tripathy, P Sahoo Modern Physics Letters A 33 (33), 1850193 , 2018 2018 Citations: 90
Magnetized strange quark model with Big Rip singularity in f ( R , T ) gravity PK Sahoo, P Sahoo, BK Bishi, S Aygün Modern Physics Letters A 32 (21), 1750105 , 2017 2017 Citations: 77
Phantom fluid supporting traversable wormholes in alternative gravity with extra material terms PK Sahoo, P Moraes, P Sahoo, G Ribeiro International Journal of Modern Physics D 28, 1950004 , 2018 2018 Citations: 76
Bianchi type string cosmological models in f(R, T) gravity PK Sahoo, B Mishra, P Sahoo, SKJ Pacif Eur. Phys. J. Plus 131, 333 , 2016 2016 Citations: 76
Bouncing scenario in gravity P Sahoo, S Bhattacharjee, SK Tripathy, PK Sahoo Modern Physics Letters A 35 (13), 2050095 , 2020 2020 Citations: 59
Magnetized strange quark matter in f (R, T) gravity with bilinear and special form of time varying deceleration parameter PK Sahoo, P Sahoo, BK Bishi, S Aygün New Astronomy 60, 80-87 , 2018 2018 Citations: 59
Wormhole model with a hybrid shape function in f (R, T) gravity P Sahoo, S Mandal, PK Sahoo New Astronomy 80, 101421 , 2020 2020 Citations: 54
gravity models as alternatives to cosmic acceleration PK Sahoo, P Moraes, P Sahoo, BK Bishi The European Physical Journal C 78 (9), 736 , 2018 2018 Citations: 47
Phantom fluid wormhole in f ( R , T ) gravity P Sahoo, A Kirschner, PK Sahoo Modern Physics Letters A 34 (37), 1950303 , 2019 2019 Citations: 40
Traversable wormholes in the traceless gravity P Sahoo, P Moraes, MM Lapola, PK Sahoo International Journal of Modern Physics D 30 (13), 2150100 , 2021 2021 Citations: 38
Periodic cosmic evolution in f ( Q ) gravity formalism P Sahoo, A De, TH Loo, PK Sahoo Communications in Theoretical Physics 74 (12), 125402 , 2022 2022 Citations: 22
LRS Bianchi type-I bulk viscous cosmological models in f (R, T) gravity P Sahoo, R Reddy Astrophysics 61 (1), 134-143 , 2018 2018 Citations: 20
Phantom energy dominated universe as a transient stage in cosmology P Moraes, PK Sahoo, B Taori, P Sahoo arXiv preprint arXiv:1812.03873 , 2018 2018 Citations: 18
New solution generating algorithm for isotropic static Einstein-Gauss-Bonnet metrics SD Maharaj, S Hansraj, P Sahoo The European Physical Journal C 81 (12), 1113 , 2021 2021 Citations: 15
Mixed fluid cosmological model in f ( R , T ) gravity P Sahoo, B Taori, KL Mahanta Canadian Journal of Physics 98 (11), 1015-1022 , 2020 2020 Citations: 9
A Bayesian Statistical Study of Bianchi Type-I Universe in Modified Gravity M Thakre, PK Dhankar, S Islam, P Sahoo, F Rahaman, B Pourhassan arXiv preprint arXiv:2601.03116 , 2026 2026
Study of Accelerated Expansion of Universe in the framework of Gravity P Sahoo arXiv preprint arXiv:2507.19826 , 2025 2025
A New Way to Construct Wormholes in Modified Gravity P Sahoo, S Mandal, PK Sahoo Current Perspective to Physical Science Research Vol. 8, 32-44 , 2024 2024
