Physics – Quantum Physics
Scientific paper
2003-02-20
Quantum Information Processing 2 (3), 153-199 (2003)
Physics
Quantum Physics
24 pages; REVTeX4; published version
Scientific paper
10.1023/B:QINP.0000004123.82268.
Is the dynamical evolution of physical systems objectively a manifestation of information processing by the universe? We find that an affirmative answer has important consequences for the measurement problem. In particular, we calculate the amount of quantum information processing involved in the evolution of physical systems, assuming a finite degree of fine-graining of Hilbert space. This assumption is shown to imply that there is a finite capacity to sustain the immense entanglement that measurement entails. When this capacity is overwhelmed, the system's unitary evolution becomes computationally unstable and the system suffers an information transition (`collapse'). Classical behaviour arises from the rapid cycles of unitary evolution and information transitions. Thus, the fine-graining of Hilbert space determines the location of the `Heisenberg cut', the mesoscopic threshold separating the microscopic, quantum system from the macroscopic, classical environment. The model can be viewed as a probablistic complement to decoherence, that completes the measurement process by turning decohered improper mixtures of states into proper mixtures. It is shown to provide a natural resolution to the measurement problem and the basis problem.
No associations
LandOfFree
A Computational Model for Quantum Measurement 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 A Computational Model for Quantum Measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Computational Model for Quantum Measurement will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-483268