203 citations · 3.4k across the 107 of their papers we have counts for
5 papers · 1 filter
Galactic wormholes: Geometry, stability, and echoes
Shauvik Biswas, Chiranjeeb Singha, Sumanta Chakraborty
In this work, we present the environmental effects on wormholes residing in a galaxy. By this, we propose that these wormholes are mimickers of supermassive black holes residing at…
Addressing issues in defining the Love numbers for black holes
Rajendra Prasad Bhatt, Sumanta Chakraborty, Sukanta Bose
We present an analytic method for calculating the tidal response function of a nonrotating and a slowly rotating black hole from the Teukolsky equation in the small-frequency and n…
Lorentzian quantum cosmology with torsion
Vikramaditya Mondal, Sumanta Chakraborty
We evaluate the Lorentzian gravitational path integral in the presence of non-vanishing torsion with the application of the Picard-Lefschetz theory for minisuperspaces correspondin…
Perturbing the perturbed: Stability of quasinormal modes in presence of a positive cosmological constant
Subhodeep Sarkar, Mostafizur Rahman, Sumanta Chakraborty
In this work, we wish to address the question -- whether the quasi-normal modes, the characteristic frequencies associated with perturbed black hole spacetimes, central to the stab…
Distinguishing cosmological models through quantum signatures of primordial perturbations
Rathul Nath Raveendran, Sumanta Chakraborty
We study the evolution of various measures of quantumness of the curvature perturbation by integrating out the inaccessible entropic fluctuations in the multi-field models of infla…