Physics – Quantum Physics
Scientific paper
2009-04-28
Quantum Inf Process 8(6):479-491 (2009)
Physics
Quantum Physics
15 pages. Submitted to Quantum Information Processing, special issue on Quantum Decoherence and Entanglement (projected public
Scientific paper
In the decoherent histories approach to quantum theory, attention focuses on the conditions under which probabilities may be assigned to sets of quantum histories. A variety of conditions have been proposed, but the most important one is decoherence, which means that the interference between every pair of histories in the set is zero. Weaker conditions have been considered, such as consistency, or linear positivity, but these are ruled out by the requirement of consistent composition of subsystems, proposed by Diosi. Here we propose a new condition which we call partial decoherence, and is the requirement that every history has zero interference with its negation. This is weaker than decoherence and stronger than linear positivity (but its relation to consistency is less simply defined -- it is neither stronger nor weaker). Most importantly, it satisfies the Diosi condition. A strengthened Diosi condition is proposed, which partial decoherence narrowly fails, due to an unusual property of inhomogeneous histories. In an appendix an example is given of a set of histories which are consistent but not decoherent.
No associations
LandOfFree
Partial Decoherence of Histories and the Diosi Test 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 Partial Decoherence of Histories and the Diosi Test, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Partial Decoherence of Histories and the Diosi Test will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-713072