302 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Indian Institute of Science Education and Research MohaliIN223 papers
- Indian Institute of Science Education and Research KolkataIN203 papers
- Rutherford Appleton LaboratoryGB194 papers
- Indian Institute of Science Education and Research, TirupatiIN191 papers
- Tata Institute of Fundamental ResearchIN191 papers
- Indian Institute of Science Education and Research BerhampurIN190 papers
- Texas A&M UniversityUS185 papers
- Purdue University West LafayetteUS184 papers
- Panjab UniversityIN183 papers
- Tsinghua UniversityCN183 papers
- Wayne State UniversityUS183 papers
- Eötvös Loránd UniversityHU182 papers
41 papers · 1 filter
Dynamical response of twin stars to perturbations
Shamim Haque, Luciano Rezzolla, Ritam Mallick
If a strong first-order phase transition takes place at sufficiently high rest-mass densities in the equation of state (EOS) modelling compact stars, a new branch will appear in th…
Gravitational waves from parabolic encounters: A study of linear and nonlinear memory
Samik Dutta, Ankur Chhabra, Aritra Banerjee +2
The memory effect is known to introduce a permanent displacement in the gravitational wave (GW) detectors after the passage of a GW signal. While the adher…
Scalar and vector modes in inflation with antisymmetric tensor field
Abhijith Ajith, Sukanta Panda
We investigate the scalar and vector modes arising from cosmological perturbations within the framework of an inflationary scenario driven by an antisymmetric tensor field, minimal…
Testing the Starobinsky model of inflation with resonant cavities
Subhendra Mohanty, Sukanta Panda, Archit Vidyarthi
We show that the Starobinsky inflation model based on gravity has a special feature that it provides a unique scalaron-two-graviton vertex with a coupling proportional to $1/…
Photon region boundary for stationary axisymmetric black holes
Prasad Padhye, Kajol Paithankar, Sanved Kolekar
The black hole shadow is fundamentally connected to the structure of light rings and the photon region in the background geometry. We investigate the photon region boundary in a ge…
Prospect of unraveling the first-order phase transition in neutron stars with and modes
Pratik Thakur, Sagnik Chatterjee, Kamal Krishna Nath +1
Quasi-normal modes of neutron stars are an exciting prospect for analyzing the internal composition of NSs and studying matter at high densities. In this work, we focus on studying…
Ghost Free Theory in Unitary Gauge: A New Candidate
Pawan Joshi, Sukanta Panda, Archit Vidyarthi
We propose an algebraic analysis using a 3+1 decomposition to identify conditions for a clever cancellation of the higher derivatives, which plagued the theory with Ostrogradsky gh…
Universal Relations For Generic Family Of Neutron Star Equations Of State
KamalKrishna Nath, Ritam Mallick, Sagnik Chatterjee
Universal relations are important in testing many theories of physics. In the case of general relativity, we have the celebrated no-hair theorem for black holes. Unfortunately, the…
Inflation using a triplet of Antisymmetric tensor fields
Abhijith Ajith, Sukanta Panda
We study an inflation model driven by a triplet of antisymmetric tensor fields, with minimal and nonminimal couplings to gravity. First, we show that the presence of a triplet of a…
Constant-Roll Inflation in modified gravity model using Palatini Formalism
Sukanta Panda, Arun Rana, Rahul Thakur
In this work, we study a constant-roll inflationary model in the Palatini formalism using modified gravity. Here our action consists a non-minimal coupling of a scalar field wi…
Coupled scalar field cosmology with effects of curvature
Trupti Patil, Sukanta Panda
In the present study, we investigate the interaction between dark energy and dark matter, particularly emphasizing the effects of curvature in the realm of Friedmann-Lemaitre-Rober…
Imprints of Anisotropy on the Power Spectrum in Matter Dominated Bouncing Universe as Background
Asha B Modan, Sukanta Panda, Arun Rana
In this paper, we aim to investigate the effects of the anisotropy on the scale-invariant power spectrum considering the matter-dominated collapsing universe as background and look…
Dynamics of interacting scalar field model in the realm of chiral cosmology
Trupti Patil, Sukanta Panda, Manabendra Sharma +1
The strange behaviour of the universe's dark sector offers us the flexibility to address cosmological problems with different approaches. Using this flexibility, we consider a poss…
Ultraviolet Unitarity Violations in Non-minimally Coupled Scalar-Starobinsky Inflation
Sukanta Panda, Abbas Altafhussain Tinwala, Archit Vidyarthi
We perform the calculation for tree-level ultraviolet unitarity violation scales for scalar- inflation models by including an additional -type term. Due to certain…
Hamiltonian Analysis of Nonlocal F(R) Gravity Models
Pawan Joshi, Sukanta Panda
We construct a Hamiltonian for the nonlocal F(R) theory in the present work. By this construction, we demonstrate the nature of the ghost degrees of freedom. Finally, we find condi…
Inflation with antisymmetric tensor field: new candidates
Sandeep Aashish, Abhijith Ajith, Sukanta Panda +1
We study classes of inflation models driven by antisymmetric tensor field, with minimal and nonminimal couplings to gravity, that address known issues of such models considered in…
Tidal effect on the gyroscopic precession around a compact star
Kamal Krishna Nath, Debojoti Kuzur, Ritam Mallick
General relativistic effects in the spacetime around the massive astrophysical objects can be captured using a spinning test gyro orbiting around the object in a circular geodesic.…
Note on stability and microcausality in Lorentz violating antisymmetric tensor field
Sandeep Aashish
The fundamental issues of microcausality and energy positivity conditions are important to be investigated in the context of spontaneous Lorentz violating theories. We check the mi…
Gravitational waves from inflation with antisymmetric tensor field
Sandeep Aashish, Abhilash Padhy, Sukanta Panda
We build upon the past studies of inflation with rank-2 antisymmetric tensor field, including here the tensor perturbations to metric. We perform a comprehensive analysis of the ba…
Inflation and Reheating in f(R,h) theory formulated in the Palatini formalism
Nayan Das, Sukanta Panda
A new model for inflation using modified gravity in the Palatini formalism is constructed. Here non-minimal coupling of scalar field h with the curvature R as a general function f(…
Model Comparison tests of modified gravity from the Eöt-Wash experiment
Aditi Krishak, Shantanu Desai
Perivolaropoulos et al (arXiv:1904.09462) (P19) have argued that the residual torque data in the Eöt-Wash experiment is consistent with an oscillating signal. This could either be…
Covariant quantum corrections to a scalar field model inspired by nonminimal natural inflation
Sandeep Aashish, Sukanta Panda
We calculate the covariant one-loop quantum gravitational effective action for a scalar field model inspired by the recently proposed nonminimal natural inflation model. Our calcul…
Exact Solutions and Constraints on the Dark Energy Model in FRW Universe
Albin Joseph, Rajib Saha
The inflationary epoch and the late time acceleration of the expansion rate of universe can be explained by assuming a gravitationally coupled scalar field. In this article, we pro…
Hamiltonian Formalism for Nonlocal Gravity Models
Pawan Joshi, Utkarsh Kumar, Sukanta Panda
Nonlocal gravity models are constructed to explain the current acceleration of the universe. These models are inspired by the infrared correction appearing in Einstein Hilbert acti…