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 Schrodinger cat states.
On the Use of Classical and Quantum Fisher Information in Molecular Magnetism
Troiani filippo
2016
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 Schrodinger cat states.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
