Abstract Details
| Name: Pabitra Gayen Affiliation: Presidency University, Kolkata Conference ID: ASI2024_733 Title : Scalar and Spinor Quasi Normal Modes of a 2D Dilatonic Blackhole Authors and Co-Authors : Pabitra Gayen, Ratna Koley Abstract Type : Poster Abstract Category : High Energy Phenomena, Fundamental Physics and Astronomy Abstract : Blackhole quasi-normal modes (QNMs) can be used in estimating the parameters of a blackhole. In this work we have studied external non-minimally coupled scalar and spinor field perturbations in a (1+1) dimensional dilatonic blackhole spacetime. Exact analytical expressions of the quasi-normal mode frequencies have been found for both the cases. The quasi-normal mode frequencies turn out to be purely imaginary and negative for the scalar perturbations and resulting purely damped modes. Furthermore we have found that the quasi-normal frequencies for Dirac field exhibit both real and imaginary part. Damped oscillatory feature has been found in the time evolution profile of Dirac field and oscillation frequency increases with the of increase of coupling strength with the dilaton but damping is independent of it. For both types of fields, the damping feature increases with the increase of overtone number i.e. more the overtone number, a field is more damped. The decay profile ensures the stability of the blackhole spacetime under these perturbations. |