20 citations · 89 across the 28 of their papers we have counts for
28 papers
Dynamically Generated Fermi Surface Mismatch and Relativistic Superfluidity in a Two-Component Massless Fermionic Theory
Susobhan Mandal, Sambuddha Sanyal
When fermions pair across mismatched Fermi surfaces, the mismatch reflects a built-in inequivalence between the species. We show it can instead arise dynamically by spontaneous sym…
A non-local origin for massive gravity and late-time acceleration
Susobhan Mandal, S. Shankaranarayanan
The accelerated expansion of the universe poses a significant challenge to General Relativity. Non-local modifications to gravity have emerged as a compelling class of theories to…
Thermal field theories coupled to curved spacetime
Susobhan Mandal
Thermal field theory is an essential tool for comprehending various physical phenomena, including astrophysical objects such as neutron stars and white dwarfs, as well as the early…
Gyromagnetic ratio and Pauli form factor in anisotropic QED at one-loop
Susobhan Mandal, Subrata Mandal
The gyromagnetic ratio and Pauli form factor are important quantities that characterize the electric and magnetic moment distribution of a particle. The experimentally measured val…
Quantum signatures in black hole accretion: Pair production in dynamical magnetic fields
Susobhan Mandal, Tausif Parvez, S. Shankaranarayanan
Accretion disks around black holes host extreme conditions where general relativity and magnetohydrodynamics dominate. These disks exhibit two distinct dynamical regimes -- Standar…
Modified theories of gravity at different curvature scales
Susobhan Mandal, S. Shankaranarayanan
General Relativity (GR) remains the cornerstone of gravitational physics, providing remarkable success in describing a wide range of astrophysical and cosmological phenomena. Howev…
Can Q-balls describe cosmological and galactic dark matter?
Susobhan Mandal, S. Shankaranarayanan
The Cold Dark Matter (CDM) hypothesis accurately predicts large-scale structure formation and fits the Cosmic Microwave Background temperature fluctuations (CMB). However, observat…
Neutrino oscillation in the presence of background classical sources
Susobhan Mandal
The presence of background classical sources affects a quantum field theory significantly in different ways. Neutrino oscillation is a phenomenon that confirms that neutrinos are m…
Generation of effective massive Spin-2 fields through spontaneous symmetry breaking of scalar field
Susobhan Mandal, S. Shankaranarayanan
General relativity and quantum field theory are the cornerstones of our understanding of physical processes, from subatomic to cosmic scales. While both theories work remarkably we…
Ward identities under the frame transformations in curved spacetime
Susobhan Mandal
Scalar-tensor theories of gravity are considered to be competitors to Einstein's theory of general relativity for the description of classical gravity, as they are used to build fe…
Dynamical 4-D Gauss-Bonnet action from matter-graviton interaction at one-loop
Susobhan Mandal, S. Shankaranarayanan
The occurrence of singularities at the centers of black holes suggests that general relativity (GR), although a highly successful model of gravity and cosmology, is inapplicable. T…
Effects of magnetic field on the equation of state in curved spacetime of a neutron star
Golam Mortuza Hossain, Susobhan Mandal
Neutron stars are known to have strong magnetic fields reaching as high as Gauss, besides having strongly curved interior spacetime. So for computing an equation of state…
From Horndeski action to the Callan-Giddings-Harvey-Strominger model and beyond
Susobhan Mandal, Tausif Parvez, S. Shankaranarayanan
The knowledge of what entered black hole (BH) is completely lost as it evaporates. This contradicts the unitarity principle of quantum mechanics and is referred to as the informati…
Origin of primeval seed magnetism in rotating astrophysical bodies
Golam Mortuza Hossain, Susobhan Mandal
We show that a primeval seed magnetic field arises due to spin-degeneracy breaking of fermions caused by the dragging of inertial frames in the curved spacetime of rotating astroph…
Solitons in curved spacetime
Susobhan Mandal
Derrick's theorem is an important result that decides the existence of soliton configurations in field theories in different dimensions. It is proved using the extremization of fin…
Classification of quantum states based on the null energy condition
Susobhan Mandal
Violation of the null energy condition plays an important role both in the general theory of relativity and quantum field theory in curved spacetimes. Over the years, it has been s…
Higher mass limits of neutron stars from the equation of states in curved spacetime
Golam Mortuza Hossain, Susobhan Mandal
In order to solve the Tolman-Oppenheimer-Volkoff equations for neutron stars, one routinely uses the equation of states which are computed in the Minkowski spacetime. Using a first…
Equation of states in the curved spacetime of spherical degenerate stars
Golam Mortuza Hossain, Susobhan Mandal
In the study of spherical degenerate stars such as neutron stars, general relativistic effects are incorporated by using Tolman-Oppenheimer-Volkoff equations to describe their inte…
Characteristics of interaction between Gravitons and Photons
Athira B S, Susobhan Mandal, Subhashish Banerjee
The direct detection of gravitational waves from binary mergers has been hailed as the discovery of the century. In the light of recent evidence on the existence of gravitational w…
Existence of conserved quantities and their algebra in curved spacetime
Susobhan Mandal
In General Relativity, finding out the geodesics of a given spacetime manifold is an important task because it determines which classical processes are dynamically forbidden. Conse…
Local description of S-matrix in quantum field theory in curved spacetime using Riemann-normal coordinate
Susobhan Mandal, Subhashish Banerjee
The success of the S-matrix in quantum field theory in Minkowski spacetime naturally demands the extension of the construction of the S-matrix in a general curved spacetime in a co…
Reduced Chandrasekhar mass limit due to the fine-structure constant
Golam Mortuza Hossain, Susobhan Mandal
The electromagnetic interaction alters the Chandrasekhar mass limit by a factor which depends, as computed in the literature, on the atomic number of the positively charged nuclei…
The methods of thermal field theory for degenerate quantum plasmas in astrophysical compact objects
Golam Mortuza Hossain, Susobhan Mandal
In the study of degenerate plasmas contained within compact astrophysical objects, both special relativity and general relativity play important roles. After reviewing the existing…
Low-energy effective quantum field theoretic description of excitations about soliton configurations
Susobhan Mandal
Solitons are the classical field configurations connecting two trivial vacua. These are also the solutions of classical field equations of motion with particle-like properties. Mor…