| Name: | Pabitra Gayen |
| Affiliation: | Presidency University, Kolkata |
| Conference ID : | ASI2024_733 |
| Title : | Scalar and Spinor Quasi Normal Modes of a 2D Dilatonic Blackhole |
| Authors : | Pabitra Gayen, Ratna Koley |
| Authors Affiliation: | Pabitra Gayen, Ratna Koley Affiliation (Presidency University, Kolkata-700073, India) |
| Mode of Presentation: | 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. |
