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Copyrighted This material is provided for private study, scholarship, or research. Transmission or reproduction of any material protected by copyright beyond that allowed by fair use requires the written permission of the copyright owners. The authors or their heirs retain their copyrights to the material. Unless otherwise indicated, the original files were donated to the American Institute of Physics (https://history.aip.org/ead/20130435.html). For permission to publish, contact Jeffrey A. Barrett, representative for the Everett estate, j.barrett@uci.edu.
Description
Scope/Content: Before writing a first draft of the long thesis, Hugh Everett wrote three short papers, often refered to as his minipapers, for John Wheeler to review. This minipaper, called "Quantitative measure of correlation," lays some groundwork for the application of information theory as a measure of the degree of quantum correlation or entanglement. From very early in the project, Everett thought that Shannon information theory would provide insight into pure wave mechanics. While statistical measures, such as standard deviation, would have sufficed, Everett developed information-theoretic measures to represent such things as the width of distributions and the degree of correlation between the states of multiple systems. He thought that the standard quantum uncertainty relations were best expressed in an information theoretic way. The present document is the typed version of the minipaper that Wheeler would have seen and commented on. Scope/Content: This document is a reproduction of a document found in the Hugh Everett archive, American Institute of Physics.
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