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    Comonotonicity and Choquet integrals of Hermitian operators and their applications.

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    Publication date
    2016
    Author
    Vourdas, Apostolos
    Keyword
    Comonotonicity; Choquet integrals; Hermitian operators; Applications; Quantum system
    Rights
    © 2016 IOP. Reproduced in accordance with the publisher's self-archiving policy.
    Peer-Reviewed
    yes
    
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    Abstract
    In a quantum system with d-dimensional Hilbert space, the Q-function of a Hermitian positive semide nite operator , is de ned in terms of the d2 coherent states in this system. The Choquet integral CQ( ) of the Q-function of , is introduced using a ranking of the values of the Q-function, and M obius transforms which remove the overlaps between coherent states. It is a gure of merit of the quantum properties of Hermitian operators, and it provides upper and lower bounds to various physical quantities in terms of the Q-function. Comonotonicity is an important concept in the formalism, which is used to formalize the vague concept of physically similar operators. Comonotonic operators are shown to be bounded, with respect to an order based on Choquet integrals. Applications of the formalism to the study of the ground state of a physical system, are discussed. Bounds for partition functions, are also derived.
    URI
    http://hdl.handle.net/10454/7763
    Version
    Accepted Manuscript
    Citation
    Vourdas, A (2016) Comonotonicity and Choquet integrals of Hermitian operators and their applications. Journal of Physics A: Mathematical and Theoretical. 49(14): 145002 (36pp).
    Link to publisher’s version
    http://iopscience.iop.org/article/10.1088/1751-8113/49/14/145002/meta
    Type
    Article
    Collections
    Engineering and Informatics Publications

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