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Existence of an information unit as a postulate of quantum theory

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Masanes, Lluís and Muller, Markus P. and Augusiak, Remigiusz and Pérez García, David (2013) Existence of an information unit as a postulate of quantum theory. Proceedings of the National Academy of Sciences of the United States of America, 110 (41). pp. 16373-16377. ISSN 0027-8424

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Abstract

Does information play a significant role in the foundations of physics? Information is the abstraction that allows us to refer to the states of systems when we choose to ignore the systems themselves. This is only possible in very particular frameworks, like in classical or quantum theory, or more generally, whenever there exists an information unit such that the state of any system can be reversibly encoded in a sufficient number of such units. In this work, we show how the abstract formalism of quantum theory can be deduced solely from the existence of an information unit with suitable properties, together with two further natural assumptions: the continuity and reversibility of dynamics, and the possibility of characterizing the state of a composite system by local measurements. This constitutes a set of postulates for quantum theory with a simple and direct physical meaning, like the ones of special relativity or thermodynamics, and it articulates a strong connection between physics and information.


Item Type:Article
Uncontrolled Keywords:Postulates of quantum mechanics; Physics of information; Quantum information
Subjects:Sciences > Physics > Mathematical physics
ID Code:23639
Deposited On:21 Nov 2013 09:59
Last Modified:26 Nov 2014 11:23

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