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Magnetochemistry 2016, 2(3), 33; doi:10.3390/magnetochemistry2030033

On the Use of Classical and Quantum Fisher Information in Molecular Magnetism

S3 Istituto Nanoscienze, Consiglio Nazionale delle Ricerche, via G. Campi 213/A, I-41125 Modena, Italy
Academic Editor: Floriana Tuna
Received: 30 July 2016 / Revised: 29 August 2016 / Accepted: 1 September 2016 / Published: 8 September 2016
(This article belongs to the Special Issue Molecules in Quantum Information)
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Abstract

The present paper discusses the use of two information-theoretical quantities—namely, the classical and quantum Fisher information—in the context of molecular magnetism. These functions quantify the suitability of a given observable to the estimation of a physical parameter and provide the highest precision allowed by quantum mechanics in such an estimation process. The quantum Fisher information also quantifies the degree of macroscopicity of a quantum state. As illustrative examples of such applications, we compute the classical and quantum Fisher information of the Fe 4 molecular nanomagnet, used as a probe of an applied magnetic field or as a platform for generating Schrödinger cat states. View Full-Text
Keywords: molecular nanomagnets; quantum information; parameter estimation; Fisher information molecular nanomagnets; quantum information; parameter estimation; Fisher information
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Troiani, F. On the Use of Classical and Quantum Fisher Information in Molecular Magnetism. Magnetochemistry 2016, 2, 33.

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