165 citations · 2.7k across the 80 of their papers we have counts for
9 papers · 1 filter
Shadow analysis for rotating black holes in the presence of plasma for an expanding universe
Abhishek Chowdhuri, Arpan Bhattacharyya
We explore the structure of shadow for a Kerr-de Sitter black hole with a non-magnetized, pressureless plasma surrounding it. Specific plasma distributions are considered to separa…
Scalar perturbations of black holes in Jackiw-Teitelboim gravity
Srijit Bhattacharjee, Subhodeep Sarkar, Arpan Bhattacharyya
We study linear scalar perturbations of black holes in two-dimensional (2D) gravity models with a particular emphasis on Jackiw-Teitelboim (JT) gravity. We obtain an exact expressi…
Complexity from the Reduced Density Matrix: a new Diagnostic for Chaos
Arpan Bhattacharyya, S. Shajidul Haque, Eugene H. Kim
We investigate circuit complexity to characterize chaos in multiparticle quantum systems. In the process, we take a stride to analyze open quantum systems by using complexity. We p…
Displacement memory effect near the horizon of black holes
Srijit Bhattacharjee, Shailesh Kumar, Arpan Bhattacharyya
We study the displacement memory effect and its connection with the extended-BMS symmetries near the horizon of black holes. We show there is a permanent shift in the geodesic devi…
Structural Phase Dependent Giant Interfacial Spin Transparency in W/CoFeB Thin Film Heterostructure
Surya Narayan Panda, Sudip Majumder, Arpan Bhattacharyya +3
Pure spin current has transfigured the energy-efficient spintronic devices and it has the salient characteristic of transport of the spin angular momentum. Spin pumping is a potent…
The Multi-faceted Inverted Harmonic Oscillator: Chaos and Complexity
Arpan Bhattacharyya, Wissam Chemissany, S. Shajidul Haque +2
The harmonic oscillator is the paragon of physical models; conceptually and computationally simple, yet rich enough to teach us about physics on scales that span classical mechanic…
The Rise of Cosmological Complexity: Saturation of Growth and Chaos
Arpan Bhattacharyya, Saurya Das, S. Shajidul Haque +1
We compute the circuit complexity of scalar curvature perturbations on FLRW cosmological backgrounds with fixed equation of state using the language of squeezed vacuum states.…
Topological Phase Transitions Induced by Varying Topology and Boundaries in the Toric Code
Amit Jamadagni, Arpan Bhattacharyya
One of the important characteristics of topological phases of matter is the topology of the underlying manifold on which they are defined. In this paper, we present the sensitivity…
Cosmological Complexity
Arpan Bhattacharyya, Saurya Das, S. Shajidul Haque +1
We compute the quantum circuit complexity of the evolution of scalar curvature perturbations on expanding backgrounds, using the language of squeezed vacuum states. In particular,…