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Converting multilevel nonclassicality into genuine multipartite entanglement

Regula, Bartosz; Piani, Marco; Cianciaruso, Marco; Bromley, Thomas R.; Streltsov, Alexander; Adesso, Gerardo

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Bartosz Regula

Marco Piani

Marco Cianciaruso

Thomas R. Bromley

Alexander Streltsov


Characterizing genuine quantum resources and determining operational rules for their manipulation are crucial steps to appraise possibilities and limitations of quantum technologies. Two such key resources are nonclassicality, manifested as quantum superposition between reference states of a single system, and entanglement, capturing quantum correlations among two or more subsystems. Here we present a general formalism for the conversion of nonclassicality into multipartite entanglement, showing that a faithful reversible transformation between the two resources is always possible within a precise resource-theoretic framework. Specializing to quantum coherence between the levels of a quantum system as an instance of nonclassicality, we introduce explicit protocols for such a mapping. We further show that the conversion relates multilevel coherence and multipartite entanglement not only qualitatively, but also quantitatively, restricting the amount of entanglement achievable in the process and in particular yielding an equality between the two resources when quantified by fidelity-based geometric measures.


Regula, B., Piani, M., Cianciaruso, M., Bromley, T. R., Streltsov, A., & Adesso, G. (2018). Converting multilevel nonclassicality into genuine multipartite entanglement. New Journal of Physics, 20, Article 033012.

Journal Article Type Article
Acceptance Date Feb 12, 2018
Online Publication Date Feb 12, 2018
Publication Date Mar 26, 2018
Deposit Date Mar 5, 2018
Publicly Available Date Mar 5, 2018
Journal New Journal of Physics
Electronic ISSN 1367-2630
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 20
Article Number 033012
Public URL
Publisher URL


Regula_2018_New_J._Phys._20_033012.pdf (608 Kb)

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