21 citations · 50 across the 6 of their papers we have counts for
6 papers
Adiabatic inspirals under electromagnetic radiation reaction on Kerr spacetime
Ethan J German, Kevin Cunningham, Visakan Balakumar +2
A compact body in orbit about a black hole loses orbital energy and angular momentum through radiation-reaction processes, inspiralling towards the black hole until a final plunge.…
Superradiance and quantum states on black hole space-times
Visakan Balakumar, Rafael Bernar, Elizabeth Winstanley
We consider the definition of the Boulware and Hartle-Hawking states for quantum fields on black hole space-times. The properties of these states on a Schwarzschild black hole have…
Quantization of a charged scalar field on a charged black hole background
Visakan Balakumar, Rafael P. Bernar, Elizabeth Winstanley
We study the canonical quantization of a massless charged scalar field on a Reissner-Nordstrom black hole background. Our aim is to construct analogues of the standard Boulware, Un…
Quantum superradiance on static black hole space-times
Visakan Balakumar, Rafael P. Bernar, Luis C. B. Crispino +1
We study the quantum analogue of the classical process of superradiance for a massless charged scalar field on a static charged black hole space-time. We show that an "in" vacuum s…
Hadamard parametrix of the Feynman Green's function of a five-dimensional charged scalar field
Visakan Balakumar, Elizabeth Winstanley
The Hadamard parametrix is a representation of the short-distance singularity structure of the Feynman Green's function for a quantum field on a curved space-time background. Subtr…
Hadamard renormalization for a charged scalar field
Visakan Balakumar, Elizabeth Winstanley
The Hadamard representation of the Green's function of a quantum field on a curved space-time is a powerful tool for computations of renormalized expectation values. We study the H…