G.R.K.thanks the Department of Atomic Energy(DAE)for long-term support of this research,at present from the grant"Physics and Astronomy(Project Identification No.RTI4002)Department of Atomic Energy,Tata Institute of Fundamen-tal Research"and partially from Grant No.JBR/2020/00039 of the Anusandhan National Research Foundation(ANRF),both agencies of the Government of India.A.D.acknowledges sup-port from the ANRF through the J.C.Bose Fellowship Grant No.JCB/2017/000055 and Core Research Grant(CRG)Proposal Nos.ANRF/JBG/2025/000237/PS and CRG/2022/002782.A.D.L.acknowledges partial support from the Infosys-TIFR Leading Edge Research Grant(Cycle 2).A.D.and D.M.would like to acknowledge the OSIRIS Consortium,consisting of UCLA and IST(Lisbon,Por-tugal),for providing access to the OSIRIS framework,which is work supported by Grant No.NSF ACI-1339893.A.D.also acknowledges help from Laxman Prasad Goswami to re-affirm simulation using various platforms.We thank Professor K.Subramanian(IUCAA,Pune)and Professor Dipankar Bhattacharya(RRI,Bangalore)for insightful discussions on the negative-energy modes from black holes.We thank Ankit Dulat for his help with the manuscript. （DAE）