28 citations · 100 across the 17 of their papers we have counts for
18 papers
Vanishing Love Numbers of Kerr-Newman Black Holes
Sumanta Chakraborty, Takuya Katagiri, Paolo Pani +1
Tidal Love numbers characterize the conservative response of compact objects to external perturbations and provide a powerful probe of their nature. While the static Love numbers o…
Tidal deformation of an accreting compact object
Avijit Chowdhury, Chiranjeeb Singha, Kazuharu Bamba +1
Tidal deformation of a compact object serves as a sensitive probe of the strong-gravity regime and nature of the compact object. It captures how a compact object responds to the ex…
Dynamical tidal Love numbers of black holes under generic perturbations: Connecting black hole perturbation theory with effective field theory
Sumanta Chakraborty, M. V. S Saketh, Tanja Hinderer +1
The foundation for modeling the coupling of the internal structure of compact objects in binary systems to their dynamics and emitted gravitational waves is a systematic effective…
Tidal Response of Compact Objects
Sumanta Chakraborty, Paolo Pani
The tidal response of compact objects provides a powerful probe of their internal structure and of the surrounding gravitational field. We provide a comprehensive and unified overv…
Universal Ladder Structure Across Scales: From Quantum to Black Hole Physics
Rajes Ghosh, Rajendra Prasad Bhatt, Sumanta Chakraborty +1
Second-order ordinary linear differential equations appear ubiquitously across physics, describing the behavior of systems from the quantum world of atoms to the classical world of…
Excitation factors for horizonless compact objects: long-lived modes, echoes, and greybody factors
Romeo Felice Rosato, Shauvik Biswas, Sumanta Chakraborty +1
We present an analytical and numerical investigation of the quasinormal excitation factors of ultracompact horizonless objects. These systems possess long lived quasinormal modes w…
Fermionic Love of Black Holes in General Relativity
Sumanta Chakraborty, Pierre Heidmann, Paolo Pani
Black holes in General Relativity exhibit a remarkable feature: their response to static scalar, electromagnetic, and gravitational perturbations -- as quantified by the so-called…
Tidal deformation of black holes in Lovelock gravity
Chiranjeeb Singha, Sumanta Chakraborty
It is well established that black holes in four-dimensional, vacuum, general relativity exhibit vanishing static tidal Love numbers, indicating no multipolar response to the extern…
Dynamical Love numbers of black holes: Theory and gravitational waveforms
Sumanta Chakraborty, Valerio De Luca, Leonardo Gualtieri +1
In General Relativity, the static tidal Love numbers of black holes vanish identically. Whether this remains true for time-dependent tidal fields -- i.e., in the case of dynamical…
One Membrane to Love them all: Tidal deformations of compact objects from the membrane paradigm
Michela Silvestrini, Elisa Maggio, Sumanta Chakraborty +1
The tidal deformability is a key observable to test the nature of compact objects in a binary coalescence. Within vacuum General Relativity, the tidal Love numbers of a four-dimens…
Manifestation of quantum entanglement between harmonic oscillators in de Sitter
Sumanta Chakraborty, Anupam Mazumdar, Ritapriya Pradhan
Two harmonic oscillators interacting through the exchange of a quantum field leads to non-zero entanglement between the two, which is absent for classical interaction. In this work…
Effect of ultralight dark matter on compact binary mergers
Kabir Chakravarti, Soham Acharya, Sumanta Chakraborty +1
The growing catalogue of gravitational wave events enables a statistical analysis of compact binary mergers, typically quantified by the binary merger rate density. This quantity c…
Greybody factors, reflectionless scattering modes, and echoes of ultracompact horizonless objects
Romeo Felice Rosato, Shauvik Biswas, Sumanta Chakraborty +1
Motivated by a recently discovered connection between the greybody factors of black holes and the ringdown signal, we investigate the greybody factors of ultracompact horizonless o…
Connecting quasi-normal modes with causality in Lovelock theories of gravity
Avijit Chowdhury, Akash K Mishra, Sumanta Chakraborty
The eikonal correspondence between the quasi-normal modes (QNMs) of asymptotically flat static spherically symmetric black holes and the properties of unstable null circular geodes…
Accreting Schwarzschild-like compact object: Plasma-photon interaction and stability
Avijit Chowdhury, Shauvik Biswas, Sumanta Chakraborty
Accretion is a common phenomenon associated with any astrophysical compact object, which is best described by plasma, a state of matter composed of electrons and heavy ions. In thi…
Asymptotically de-Sitter black holes have non-zero tidal Love numbers
Sreejith Nair, Sumanta Chakraborty, Sudipta Sarkar
Love numbers of compact objects quantify their tidal deformability against external perturbations. It is expected that Love numbers of asymptotically flat black holes (BHs) in Gene…
Distinguishing Jordan and Einstein frames in gravity through entanglement
Sumanta Chakraborty, Anupam Mazumdar, Ritapriya Pradhan
In general relativity, the use of conformal transformation is ubiquitous and leads to two different frames of reference, known as the Jordan and the Einstein frames. Typically, the…
Dynamical tidal Love numbers of Kerr-like compact objects
Sumanta Chakraborty, Elisa Maggio, Michela Silvestrini +1
We develop a framework to compute the tidal response of a Kerr-like compact object in terms of its reflectivity, compactness, and spin, both in the static and the frequency-depende…