Nonclassicality quasiprobability of single-photon-added thermal states
Authors: Kiesel T., Vogel W., Bellini M., Zavatta A.
Autors Affiliation: Arbeitsgruppe Quantenoptik, Institut für Physik, Universität Rostock, D-18051 Rostock, Germany; Istituto Nazionale di Ottica, INO-CNR, L.go E. Fermi, 6, I-50125, Florence, Italy; LENS, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Florence, Italy
Abstract: We report the experimental reconstruction of a nonclassicality quasiprobability for a single-photon-added thermal state. This quantity has significant negativities, which is necessary and sufficient for the nonclassicality of the quantum state. Our method exhibits several advantages compared to the reconstruction of the P function, since the nonclassicality filters used in this case can regularize the quasiprobabilities as well as their statistical uncertainties. A priori assumptions about the quantum state are therefore not necessary. We also demonstrate that, in principle, our method is not limited by small quantum efficiencies.
Journal/Review: PHYSICAL REVIEW A
Volume: 83 (3) Pages from: 032116 to: 032116
More Information: This work was supported by the Deutsche Forschungsgemeinschaft through SFB 652, and partially supported by Ente Cassa di Risparmio di Firenze and Regione Toscana under project CTOTUS.KeyWords: Nonclassicality; P-function; Quantum state; Quasiprobability; Statistical uncertainty; Thermal state, Particle beams; Photons, Quantum theoryDOI: 10.1103/PhysRevA.83.032116Citations: 37data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-11-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here