Chapter

Composite Systems, Interaction, and Measurement

Bas C. van Fraassen

in Quantum Mechanics

Published in print September 1991 | ISBN: 9780198239802
Published online November 2003 | e-ISBN: 9780191597466 | DOI: http://dx.doi.org/10.1093/0198239807.003.0007

Series: Clarendon Paperbacks

 Composite Systems, Interaction, and Measurement

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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

Chapter.  17584 words. 

Subjects: Philosophy of Science

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