Quantum Prediction Algorithms

Details Quantum Prediction Algorithms Quantum Prediction Algorithms

1996-10-15

arxiv.org/abs/gr-qc/9610028v1

Phys.Rev.A55:1703-1720,1997

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

53 pages, RevTeX with LaTeX2e

Scientific paper

10.1103/PhysRevA.55.1703

The consistent histories formulation of the quantum theory of a closed system with pure initial state defines an infinite number of incompatible consistent sets, each of which gives a possible description of the physics. We investigate the possibility of using the properties of the Schmidt decomposition to define an algorithm which selects a single, physically natural, consistent set. We explain the problems which arise, set out some possible algorithms, and explain their properties with the aid of simple models. Though the discussion is framed in the language of the consistent histories approach, it is intended to highlight the difficulty in making any interpretation of quantum theory based on decoherence into a mathematically precise theory.

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