Higher curvature self-interaction corrections to Hawking radiation

Abstract

The purely thermal nature of Hawking radiation from evaporating black holes leads to the information loss paradox. A possible route to its resolution could be if (enough) correlations are shown to be present in the radiation emitted from evaporating black holes. A re-analysis of Hawking's derivation including the effects of self-interactions in GR shows that the emitted radiation does deviate from pure thermality, however no correlations exist between successively emitted Hawking quanta. We extend the calculations to Einstein-Gauss-Bonnet gravity and investigate if higher curvature corrections to the action lead to some new correlations in the Hawking spectra. The effective trajectory of a massless shell is determined by solving the constraint equations and the semiclassical tunneling probability is calculated. As in the case of general relativity, the radiation is no longer thermal but there is no correlation between successive emissions. The absence of any extra correlations in the emitted radiations even in Gauss-Bonnet gravity suggests that the resolution of the paradox is beyond the scope of semi-classical gravity.

Role of Faddeevian anomaly in the s-wave scattering of chiral fermion off dilaton black holes towards preservation of information

“…Apart from studying information related problem through the s-wave scattering of fermion off dilaton black-hole there are several approaches to study this information preservation related question [29][30][31][32]. The information preserving result as we have obtained hare also agrees with the recent result obtained in [29,30].…”