What question did this study set out to answer?

The aim is to explore the relationship between physical entropy and information theory, highlighting early insights from Szilard's work.

January 1, 1964

On the decrease of entropy in a thermodynamic system by the intervention of intelligent beings

Key Points

The aim is to explore the relationship between physical entropy and information theory, highlighting early insights from Szilard's work.
Translation of Szilard's 1929 paper on entropy reduction in thermodynamic systems.
Revision by Dr. Carl Eckart to ensure accuracy and clarity of concepts.
Analysis of how Szilard's ideas integrate physical and cognitive frameworks.
Demonstrates rigorous connections between entropy reduction and information theory.
Exorcizes Maxwell's demon concept as a significant milestone in thermodynamics.
Highlights the theoretical implications of combining physical and cognitive aspects of entropy.

Abstract

In memory of Leo Szilard, who passed away on May 30,1964, we present an English translation of his classical paper ober die Enfropieuerminderung in einem thermodynamischen System bei Eingrifen intelligenter Wesen, which appeared in the Zeitschrift fur Physik, 1929,53,840-856. The publication in this journal of this translation was approved by Dr. Szilard before he died, but he never saw the copy. At Mrs. Szilard's request, Dr. Carl Eckart revised the translation. This is one of the earliest, if not the earliest paper, in which the relations of physical entropy to information (in the sense of modem mathematical theory of communication) were rigorously demonstrated and in which Maxwell's famous demon was successfully exorcised: a milestone in the integration of physical and cognitive concepts.

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