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gr-qc2023
From Horndeski action to the Callan-Giddings-Harvey-Strominger model and beyond
Susobhan Mandal, Tausif Parvez, S. Shankaranarayanan
The knowledge of what entered black hole (BH) is completely lost as it evaporates. This contradicts the unitarity principle of quantum mechanics and is referred to as the informati…
gr-qc2023
A test of Einstein's equivalence principle in future VLBI observations
Joseph P Johnson, Susmita Jana, S. Shankaranarayanan
We show that very-long-baseline-interferometry (VLBI) observations of supermassive black holes will allow us to test the fundamental principles of General Relativity (GR). GR is ba…