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gr-qc2024★ 4 cited
The Operational Meaning of Total Energy of Isolated Systems in General Relativity
Abhay Ashtekar, Simone Speziale
We present thought experiments to measure the Arnowitt-Deser-Misner and Bondi-Sachs energy of isolated systems in general relativity. The expression of the Bondi-Sachs energy used…
gr-qc2024★ 19 cited
Horizons and Null Infinity: A Fugue in 4 voices
Abhay Ashtekar, Simone Speziale
Black hole horizons in equilibrium and null infinity of asymptotically flat space-times are null 3-manifolds but have very different physical connotations. We first show that they…