Publications (265)
Neutrino-dominated relativistic shocked accretion flow around rotating black hole: implications for short gamma-ray bursts
Amit Kumar, Sayan Chakrabarti, Santabrata Das
We investigate the physical properties of the central engine powering gamma-ray bursts (GRBs), modelled as a stellar-mass black hole accreting via a neutrino-dominated accretion fl…
Ayón--Beato--GarcÃa black hole coupled with a cloud of strings: thermodynamics, shadows and quasinormal modes
Amit Kumar, Dharm Veer Singh, Sudhaker Upadhyay
We find an exact black hole solution for the Einstein gravity in the presence of Ayón--Beato--GarcÃa non-linear electrodynamics and a cloud of strings. The resulting black hole s…
Ferroelectricity at the extreme thickness limit in the archetypal antiferroelectric PbZrO
Nikhilesh Maity, Milan Haddad, Nazanin Bassiri-Gharb +4
Size-driven transition of an antiferroelectric into a polar ferroelectric or ferrielectric state is a strongly debated issue from both experimental and theoretical perspectives. Wh…
Greedy Algorithms for Steiner Forest
Anupam Gupta, Amit Kumar
In the Steiner Forest problem, we are given terminal pairs , and need to find the cheapest subgraph which connects each of the terminal pairs together. In 1991, Agraw…
Discovery and Analysis of Afterglows from Poorly Localised GRBs with the Gravitational-wave Optical Transient Observer (GOTO) All-sky Survey
Amit Kumar, B. P. Gompertz, B. Schneider +86
Gamma-ray bursts (GRBs), particularly those detected by wide-field instruments such as the Fermi/GBM, pose a challenge for optical follow-up due to their large initial localisation…
Observation of charge density wave excitonic order parameter in topological insulator monolayer WTe2
Liam Watson, Joan Ripoll, Zhengjue Tong +12
Strong electron-hole interactions in a semimetal or narrow-gap semiconductor may drive a ground state of condensed excitons. Monolayer WTe2 has been proposed as a host material for…