Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-10-16
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
11 pages, 1 figure. To appear in the proceedings of the XXV Max Born Symposium, "The Planck Scale," Wroclaw, Poland
Scientific paper
I outline motivations for believing that important quantum gravity effects lie beyond the Planck scale at both higher energies and longer distances and times. These motivations arise in part from the study of ultra-high energy scattering, and also from considerations in cosmology. I briefly summarize some inferences about such ultra-planckian physics, and clues we might pursue towards the principles of a more fundamental theory addressing the known puzzles and paradoxes of quantum gravity.
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