Speaker
Prof.
Claus Kiefer
(Univ. Koln, Germany)
Description
Canonical quantization is among the main approaches to quantum gravity.
Its main conceptual problems are reviewed in my talk.
Most of them are centred around the problem of time: a time parameter
is absent in the fundamental equations. I discuss the meaning of
time in full quantum gravity and the recovery of semiclassical time
as an approximation. This also includes the Hilbert-space problem.
I conclude with a discussion of the arrow of time and the
quantum-to-classical transition.
Ref.: C. Kiefer, Quantum Gravity, second edition
(Oxford University Press 2007).
