89 citations · 255 across the 11 of their papers we have counts for
11 papers
Microphysical manifestations of viscosity and consequences for anisotropies in the very early universe
Chandrima Ganguly, Jerome Quintin
It has been known that a non-perfect fluid that accounts for dissipative viscous effects can evade a highly anisotropic chaotic mixmaster approach to a singularity. Viscosity is of…
Cosmic no-hair theorems for viscous contracting Universes
Chandrima Ganguly
A cosmic no-hair theorem for all initially contracting, spatially homogeneous, orthogonal Bianchi Cosmologies is derived - which shows that all such Universes asymptote to a spatia…
Quasi-isotropic cycles and non-singular bounces in a Mixmaster cosmology
Chandrima Ganguly, Marco Bruni
A Bianchi IX Mixmaster spacetime is the most general spatially homogeneous solution of Einstein's equations and it can represent the space-averaged Universe. We introduce two novel…
Inhomogeneous Initial Data and Small-Field Inflation
M. C. David Marsh, John D. Barrow, Chandrima Ganguly
We consider the robustness of small-field inflation in the presence of scalar field inhomogeneities. Previous numerical work has shown that if the scalar potential is flat only ove…
Evolution of Cyclic Mixmaster Universes with Non-comoving Radiation
Chandrima Ganguly, John D. Barrow
We study a model of a cyclic, spatially homogeneous, anisotropic 'mixmaster' universe of Bianchi type IX, containing a radiation field with non-comoving ('tilted' with respect to t…
The Shape of Bouncing Universes
John D. Barrow, Chandrima Ganguly
What happens to the most general closed oscillating universes in general relativity? We sketch the development of interest in cyclic universes from the early work of Friedmann and…
Cyclic Mixmaster Universes
John D. Barrow, Chandrima Ganguly
We investigate the behaviour of bouncing Bianchi type IX `Mixmaster' universes in general relativity. This generalises all previous studies of the cyclic behaviour of closed spatia…
Evolution of initially contracting Bianchi Class A models in the presence of an ultra-stiff anisotropic pressure fluid
John D. Barrow, Chandrima Ganguly
We study the behaviour of Bianchi class A universes containing an ultra-stiff isotropic ghost field and a fluid with anisotropic pressures which is also ultra-stiff on the average.…
Penrose process in charged axion-dilaton coupled black hole
Chandrima Ganguly, Soumitra SenGupta
Using the Newman-Janis method to construct the axion-dilaton coupled charged rotating black holes, we show that the energy extraction from such black holes via Penrose process take…
Stochastic thermodynamics of active Brownian particles
Chandrima Ganguly, Debasish Chaudhuri
Examples of self propulsion in strongly fluctuating environment is abound in nature, e.g., molecular motors and pumps operating in living cells. Starting from Langevin equation of…
Quantum field theory in de Sitter and quasi-de Sitter spacetimes: Revisited
Suprit Singh, Chandrima Ganguly, T. Padmanabhan
It is possible to associate temperatures with the non-extremal horizons of a large class of spherically symmetric spacetimes using periodicity in the Euclidean sector and this proc…