Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gregr..15.1139t&link_type=abstract
General Relativity and Gravitation, Volume 15, Issue 12, pp.1139-1147
Astronomy and Astrophysics
Astronomy
2
Black Holes:Gravitation Theory, Cosmology:Gravitation Theory, Gravitation Theory:Black Holes, Gravitation Theory:Cosmology
Scientific paper
Hawking and Wald have recently argued that the process of quantum black hole evaporation requires the violation of the fundamental physical law which asserts that the time evolution of quantum states is governed by unitary operators. I show this violation can be avoided by a change in the global boundary conditions. It is remotely possible that astronomical observation could establish whether or not the universe has these boundary conditions in which quantum mechanical time evolution is governed by unitary operators.
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