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Experimental Certification of Nonclassicality via Phase-Space Inequalities.
Biagi, Nicola; Bohmann, Martin; Agudelo, Elizabeth; Bellini, Marco; Zavatta, Alessandro.
Afiliación
  • Biagi N; Istituto Nazionale di Ottica (CNR-INO), L.go E. Fermi 6, 50125 Florence, Italy.
  • Bohmann M; LENS and Department of Physics & Astronomy, University of Firenze, 50019 Sesto Fiorentino, Florence, Italy.
  • Agudelo E; Institute for Quantum Optics and Quantum Information-IQOQI Vienna, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria.
  • Bellini M; Vienna Center for Quantum Science and Technology (VCQ), Vienna, Austria.
  • Zavatta A; Institute for Quantum Optics and Quantum Information-IQOQI Vienna, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria.
Phys Rev Lett ; 126(2): 023605, 2021 Jan 15.
Article en En | MEDLINE | ID: mdl-33512213
ABSTRACT
In spite of its fundamental importance in quantum science and technology, the experimental certification of nonclassicality is still a challenging task, especially in realistic scenarios where losses and noise imbue the system. Here, we present the first experimental implementation of the recently introduced phase-space inequalities for nonclassicality certification, which conceptually unite phase-space representations with correlation conditions. We demonstrate the practicality and sensitivity of this approach by studying nonclassicality of a family of noisy and lossy quantum states of light. To this end, we experimentally generate single-photon-added thermal states with various thermal mean photon numbers and detect them at different loss levels. Based on the reconstructed Wigner and Husimi Q functions, the inequality conditions detect nonclassicality despite the fact that the involved distributions are nonnegative, which includes cases of high losses (93%) and cases where other established methods do not reveal nonclassicality. We show the advantages of the implemented approach and discuss possible extensions that assure a wide applicability for quantum science and technologies.

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Aspecto: Determinantes_sociais_saude / Equity_inequality Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Italia

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Aspecto: Determinantes_sociais_saude / Equity_inequality Idioma: En Revista: Phys Rev Lett Año: 2021 Tipo del documento: Article País de afiliación: Italia
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