90 citations · 259 across the 27 of their papers we have counts for
11 papers · 1 filter
Quantum nonlinear effects in the number-conserving analogue gravity of Bose-Einstein condensates
Kunal Pal, Uwe R. Fischer
We consider the quantum dynamics of Bose-Einstein condensates at absolute zero, and demonstrate that an analogue gravity model going beyond the standard linearized analogue gravity…
Dynamical interiors of Black-Bounce spacetimes
Kunal Pal, Kuntal Pal, Tapobrata Sarkar
Using the Israel-Darmois junction conditions, we obtain a class of regular dynamical interiors to the recently proposed black-bounce spacetimes which regularises the Schwarzschild…
Geodesically completing regular black holes by the Simpson-Visser method
Kunal Pal, Kuntal Pal, Tapobrata Sarkar
Regular black holes are often geodesically incomplete when their extensions to negative values of the radial coordinate are considered. Here, we propose to use the Simpson-Visser m…
A rotating modified JNW spacetime as a Kerr black hole mimicker
Kunal Pal, Kuntal Pal, Rajibul Shaikh +1
The Event Horizon Telescope has recently observed the images and shadows of the compact objects M87 and Sgr A at the centres of the galaxies Messier 87 and Milky Way. This…
Regularising the JNW and JMN naked singularities
Kunal Pal, Kuntal Pal, Pratim Roy +1
We extend the method of Simpson and Visser (SV) of regularising a black hole spacetime, to cases where the initial metric represents a globally naked singularity. We choose two par…
Analogue metric in a black bounce background
Kunal Pal, Kuntal Pal, Tapobrata Sarkar
The conventional approach of embedding an effective acoustic metric for sound motion in a background flat Minkowski space-time, has recently been extended to incorporate more gener…
Shadows in conformally related gravity theories
Kunal Pal, Kuntal Pal, Rajibul Shaikh +1
Null geodesics are invariant under a conformal transformation, and thus it might seem natural to assume that the observables corresponding to the shadow of a space-time are also co…
Constraining alternatives to the Kerr black hole
Rajibul Shaikh, Kunal Pal, Kuntal Pal +1
The recent observation of the shadow of the supermassive compact object M87 by the Event Horizon Telescope (EHT) collaboration has opened up a new window to probe the strong gr…
Disformal transformations and the motion of a particle in semi-classical gravity
Sandip Chowdhury, Kunal Pal, Kuntal Pal +1
The approach to incorporate quantum effects in gravity by replacing free particle geodesics with Bohmian non-geodesic trajectories has an equivalent description in terms of a confo…
Quantum potential in dust collapse with a negative cosmological constant
Sandip Chowdhury, Kunal Pal, Kuntal Pal +1
In the functional Schrodinger formalism, we obtain the wave function describing collapsing dust in an anti-de Sitter background, as seen by a co-moving observer, by mapping the res…
Collapse in gravity and the method of matching
Sandip Chowdhury, Kunal Pal, Kuntal Pal +1
Collapsing solutions in gravity are restricted due to junction conditions that demand continuity of the Ricci scalar and its normal derivative across the time-like collapsin…