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Título: | Hallmarking quantum states: unified framework for coherence and correlations |
Autor: | Giorgi, Gian Luca CSIC ORCID ; Zambrini, Roberta CSIC ORCID | Fecha de publicación: | 3-dic-2018 | Editor: | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften | Citación: | Quantum 2: 109 (2018) | Resumen: | Quantum coherence and distributed correlations among subparties are often considered as separate, although operationally linked to each other, properties of a quantum state. Here, we propose a measure able to quantify the contributions derived by both the tensor structure of the multipartite Hilbert space and the presence of coherence inside each of the subparties. Our results hold for any number of partitions of the Hilbert space. Within this unified framework, global coherence of the state is identified as the ingredient responsible for the presence of distributed quantum correlations, while local coherence also contributes to the quantumness of the state. A new quantifier, the "hookup", is introduced within such a framework. We also provide a simple physical interpretation, in terms of coherence, of the difference between total correlations and the sum of classical and quantum correlations obtained using relative-entropy-based quantifiers. | Versión del editor: | https://doi.org/10.22331/q-2018-12-03-109 | URI: | http://hdl.handle.net/10261/188204 | DOI: | 10.22331/q-2018-12-03-109 | E-ISSN: | 2521-327X |
Aparece en las colecciones: | (IFIC) Artículos |
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