Temporal limitations and digital data processing in continuous variable measurements of non-Gaussian states
Year: 2026
Authors: Petitjean A., Martin A., Melalkia MF., Gabbrielli T., Brunel L., Zavatta A., Tanzilli S., Etesse J., D’Auria V.
Autors Affiliation: Univ Cote Azur, Inst Phys Nice, CNRS, 17 Ave J Laupretre, F-06200 Nice, France; Laser Syst Lab EMP, Algiers, Algeria; Univ Florence, European Lab Nonlinear Spect LENS, Via nello Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; CNR, Ist Nazl Ottica CNR INO, Largo Enrico Fermi 6, I-50125 Florence, Italy.
Abstract: Non-Gaussian quantum states and operations are essential tools for multiple quantum information protocols exploiting light as information career. In this context, a key role is played by schemes operating with continuous wave light, in which non-Gaussian states are obtained by photon subtraction/addition and eventually reconstructed by quantum state tomography. In these configurations, the temporal resolution of the homodyne detection and the digital data processing critically affect our ability to faithfully reconstruct the produced non-Gaussian states. In this work, we apply digital data processing to experimental data to study how the temporal performances of the detection chain affect the acquisition and treatment of tomographic data. This allows understanding how these features impact the quality of quantum states observed by non-ideal detection chains. By doing so, we discuss the actual constraints on the acquisition and reconstruction of non-Gaussian states by taking into account the limitations of realistic experimental resources.
Journal/Review: OPTICS EXPRESS
Volume: 34 (13) Pages from: 23116 to: 23128
More Information: Agence Nationale de la Recherche (ANR-22-PETQ-0013) ; Universite Cote d’Azur (CSI, Academie RISE) ; Institut Universitaire de France (VDA nomination) .KeyWords: Hybrid Entanglement; Generation; LightDOI: 10.1364/OE.588523
