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Quantum MechanicsAn Empiricist View$
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Bas C. van Fraassen

Print publication date: 1991

Print ISBN-13: 9780198239802

Published to Oxford Scholarship Online: November 2003

DOI: 10.1093/0198239807.001.0001

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Composite Systems, Interaction, and Measurement

Composite Systems, Interaction, and Measurement

Chapter:
(p.193) 7 Composite Systems, Interaction, and Measurement
Source:
Quantum Mechanics
Author(s):

Bas C. van Fraassen

Publisher:
Oxford University Press
DOI:10.1093/0198239807.003.0007

The three main issues in the foundations of quantum theory are measurement, non‐locality, and identical particles (quantum statistics). All of these pertain to the relations between different parts of a composite system. Hence this chapter covers tensor products, reduction of the density matrix (reduced states), and certain aspects of Hugh Everett's relative state formalism. This is then utilized in an extended discussion of measurement as a quantum‐mechanical process.

Keywords:   density matrix, Hugh Everett, identical particles, measurement, non‐locality, quantum statistics, reduced state, reduction, relative state, tensor product

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