26 citations · 119 across the 13 of their papers we have counts for
13 papers
Signature flip in deceleration parameter: A thermodynamic phase transition?
Tanima Duary, Narayan Banerjee, Ananda Dasgupta
Using the Hayward-Kodama temperature for the apparent horizon, it is found that matter content in the Universe is not thermodynamically stable, and the entry to the late accelerate…
A Molecular Field Approach to Pressure Induced Phase Transitions in Liquid Crystals : Smectic-Nematic transition
Sabana Shabnam, Sudeshna DasGupta, Nababrata Ghoshal +2
Since a rigorous microscopic treatment of a nematic fluid system based on a pairwise interaction potential is immensely complex we had introduced a simple mean field potential whic…
The Raychaudhuri equation for a quantized timelike geodesic congruence
Shibendu Gupta Choudhury, Ananda Dasgupta, Narayan Banerjee
A recent attempt to arrive at a quantum version of Raychaudhuri's equation is looked at critically. It is shown that the method, and even the idea, has some inherent problems. The…
Raychaudhuri equation in scalar-tensor theory
Shibendu Gupta Choudhury, Ananda Dasgupta, Narayan Banerjee
Implications of the Raychaudhuri equation in focusing of geodesic congruences are studied in the framework of scalar--tensor theory of gravity. Specifically, we investigate the Bra…
Apollo's Voyage: A New Take on Dynamics in Rotating Frames
Ujan Chakraborty, Ananda Dasgupta
We first demonstrate how our general intuition of pseudoforces has to navigate around several pitfalls in rotating frames. And then, we proceed to develop an intuitive understandin…
Self Similar Collapse and the Raychaudhuri equation
Shibendu Gupta Choudhury, Soumya Chakrabarti, Ananda Dasgupta +1
The role of the Raychaudhuri equation in studying gravitational collapse is discussed. A self-similar distribution of a scalar field along with an imperfect fluid in a conformally…