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• W4307941508 abstract "From their conception to present times, different concepts and definitions of entropy take key roles in a variety of areas from thermodynamics to information science, and they can be applied to both classical and quantum systems. Among them is the Rényi entropy. It is able to characterize various properties of classical information with a unified concise form. We focus on the quantum counterpart, which unifies the von Neumann entropy, max- and min-entropy, collision entropy, etc. It can only be directly applied to Hermitian systems because it usually requires that the density matrices is normalized. For a non-Hermitian system, the evolved density matrix may not be normalized; i.e., the trace can be larger or less than one as the time evolution. However, it is not well-defined for the Rényi entropy with a non-normalized probability distribution relevant to the density matrix of a non-Hermitian system, especially when the trace of the non-normalized density matrix is larger than one. In this work, we investigate how to describe the Rényi entropy for non-Hermitian systems more appropriately. We obtain a concisely and generalized form of α-Rényi entropy, which we extend the unified order-α from finite positive real numbers to zero and infinity. Our generalized α-Rényi entropy can be directly calculated using both of the normalized and non-normalized density matrices so that it is able to describe non-Hermitian entropy dynamics. We illustrate the necessity of our generalization by showing the differences between ours and the conventional Rényi entropy for non-Hermitian detuning two-level systems." @default.
• W4307941508 created "2022-11-06" @default.
• W4307941508 creator A5036186777 @default.
• W4307941508 creator A5069482327 @default.
• W4307941508 date "2022-10-30" @default.
• W4307941508 modified "2023-10-17" @default.
• W4307941508 title "Non-Hermitian Generalization of Rényi Entropy" @default.
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• W4307941508 doi "https://doi.org/10.3390/e24111563" @default.
• W4307941508 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36359653" @default.
• W4307941508 hasPublicationYear "2022" @default.
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