Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1993-02-17
published in the book, Directions in General Relativity: Proceedings of the 1993 International Symposium, Maryland, Vol. 2: Pa
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
13 pages, preprint number SU-GP-92/12-4
Scientific paper
It is shown that the attempt to extend the notion of ideal measurement to quantum field theory leads to a conflict with locality, because (for most observables) the state vector reduction associated with an ideal measurement acts to transmit information faster than light. Two examples of such information-transfer are given, first in the quantum mechanics of a pair of coupled subsystems, and then for the free scalar field in flat spacetime. It is argued that this problem leaves the Hilbert space formulation of quantum field theory with no definite measurement theory, removing whatever advantages it may have seemed to possess vis a vis the sum-over-histories approach, and reinforcing the view that a sum-over-histories framework is the most promising one for quantum gravity.
No associations
LandOfFree
Impossible Measurements on Quantum Fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Impossible Measurements on Quantum Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impossible Measurements on Quantum Fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-66220