Converting multilevel nonclassicality into genuine multipartite entanglement

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

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Abstract

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.
Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalNew Journal of Physics
Early online date12 Feb 2018
DOIs
Publication statusE-pub ahead of print - 12 Feb 2018

Keywords

  • quantum resources
  • quantum technologies
  • nonclassicality
  • entanglement

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    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, 1-10. https://doi.org/10.1088/1367-2630/aaae9d