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gr-qc2026
Precision Ringdown Measurements of Binary Black Hole Remnants
Achal Kumar, Poulami Dutta Roy, Marek J. Szczepańczyk +1
The ringdown gravitational wave from a binary black hole (BBH) merger is a superposition of quasi-normal modes (QNMs) of the remnant black hole. In general relativity (GR), QNMs ar…
gr-qc2022
Covariant formalism for the Berry connection due to gravity
Achal Kumar, Banibrata Mukhopadhyay
It is well-known that Dirac particles gain geometric phase, namely Berry phase, while moving in an electromagnetic field. Researchers have already shown covariant formalism for the…
gr-qc2022★ 29 cited
Semiclassical analysis of Dirac fields on curved spacetime
Marius A. Oancea, Achal Kumar
We present a semiclassical analysis for Dirac fields on an arbitrary spacetime background and in the presence of a fixed electromagnetic field. Our approach is based on a Wentzel-K…