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Chemical Physics Letters

Fisher information in a two-electron entangled artificial atom

Ágnes Nagy

Published May 11, 2006• 81 citations
Publisher
DOI
10.1016/j.cplett.2006.05.013

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In the context of quantum information, both Shannon entropy and the different Jaynes entropy for a two-electron ``entangled artificial'' atom proposed by Moshinsky are studied here. The Jaynes entropy in this model is shown to be intimately related to the correlation kinetic energy. A generalization of the customary Shannon entropy based on the electron density is then proposed in terms of the electron pair correlation function. Both definitions behave in a similar way to the Jaynes entropy when considered as a function of the strength of the model electron-electron interaction.