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Quantum majorization and a complete set of entropic conditions for quantum thermodynamics

2017/08/31 by Gilad Gour, David Jennings, Francesco Buscemi +2 · 4 citations
Computer Science · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Coherence (philosophical gambling strategy) #Discrete mathematics #Majorization #Mathematics #Open quantum system #Physics #Quantum #Quantum Information and Cryptography #Quantum discord #Quantum dynamics #Quantum mechanics #Quantum operation #Quantum process #Quantum thermodynamics #Statistical Mechanics and Entropy #Statistical physics #Theoretical physics #math-ph #math.MP #quant-ph

paper · pdf · doi:10.1038/s41467-018-06261-7

published as Nature Communicationsvolume 9, Article number: 5352 (2018) · 11 pages main text + 12 pages appendix, 2 figures, v2 contains significant improvement of the presentation. Particularly, the appendix has been completely restructured and proofs expanded with more details, and with a re-derivation of thermo-majorization from quantum majorization

arxiv created 2017/12/07 · openalex publication_date 2018/12/11 · arxiv updated 2018/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

What does it mean for one quantum process to be more disordered than another? Interestingly, this apparently abstract question arises naturally in a wide range of areas such as information theory, thermodynamics, quantum reference frames, and the resource theory of asymmetry. Here we use a quantum-mechanical generalization of majorization to develop a framework for answering this question, in terms of single-shot entropies, or equivalently, in terms of semi-definite programs. We also investigate some of the applications of this framework, and remarkably find that, in the context of quantum thermodynamics it provides the first complete set of necessary and sufficient conditions for arbitrary quantum state transformations under thermodynamic processes, which rigorously accounts for quantum-mechanical properties, such as coherence. Our framework of generalized thermal processes extends thermal operations, and is based on natural physical principles, namely, energy conservation, the existence of equilibrium states, and the requirement that quantum coherence be accounted for thermodynamically.

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