3 papers
gr-qc2024
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…
astro-ph.CO2024
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…
gr-qc2024
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…