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Information × Registration Number 0221U106218, 0120U104878 , R & D reports Title Nonclassical and hybrid correlations of quantum systems under realistic conditions popup.stage_title Head Semenov Andrii О., Доктор фізико-математичних наук Registration Date 08-11-2021 Organization М.М.Bogolyubov Institute of Theoretical Physics of the National Academy of Sciences of Ukraine popup.description2  Object of research – nonclassical properties of quantum electromagnetic fields; nanowire detectors of optical radiation; josephson photomultipliers; quantum optical radiation in the turbulent atmosphere. Objectives – derivation of the photodetection formula for nanowire detectors considering the memory effect caused by both dead time and relaxation time; derivation of the positive operator-valued measure for Josephson photomultipliers; developing methods for the verification of nonclassical properties and nonclassical correlations in quantum electromagnetic radiation with nanowire detectors; obtaining time-dependent field correlation function of the fourth order for optical radiation in the turbulent atmosphere. Methods – combinatoric analysis of pulse statistics for nanowire detectors; methods of photon distribution function and phase screens for description of atmosphericquantum channels; dual forms of linear programming problems. Results: We have derived the photodetection formula for the method of continuous-wave detection with nanowire detectors considering the memory effect of previous time windows. We have derived the positive operator¬valued measure for Josephson photomultipliers. We have shown that nonclassicality of photocounting statistics for squeezed vacuum states can be tested with nanowire detectors. We have built a local realistic model for hybrid measurements (balanced–unbalanced homodyne detection) with two-mode squeezed vacuum states. We have obtained time-dependent field correlation function of the fourth order for optical radiation in the turbulent atmosphere. We have simulated time correlations of transmittance for atmospheric quantum channels. Product Description popup.authors Eremenko Ivan S. Baskov Roman A. Kovtonyuk Vadym S. Semenov Andrii O. Sokolov Andrii M. Uzunova Vira O. Yurin Mykyta D. popup.nrat_date 2021-11-08 Close