ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Barry Wardell (University College Dublin)
Title: Green function approach to self-force calculations
Date (JST): Tue, Jun 18, 2013, 10:30 - 11:30
Place: Seminar Room A
Related File: 949.pdf
Abstract: The computation of the self-force is of fundamental importance to the accurate calculation of the orbital evolution of EMRI (extreme mass ratio inspiral) binary systems and the prediction of their gravitational radiation waveform. Formal solutions of the self-force problem have been found whereby the solution is expressed in terms of an integral of the retarded Green function over the entire past world-line of a point particle. Although in principle this formal solution gives the desired result, in practice the calculation of the Green function poses a formidable challenge. Various techniques have been employed to solve this issue to varying degrees of success, but as yet no approach has been successfully applied to compute the self-force in a black hole space-time. We present a novel approach to the problem which combines new numerical and analytical techniques for calculating the retarded Green function and hence the self-force.