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Information × Registration Number 0120U104901, ( 0221U100837  0221U105738  0221U106132  0221U106187  0222U003329  0223U004086  0223U004743  ) R & D request Title Nonclassical and hybrid correlations of quantum systems under realistic conditions Head Kliushnichenko Oleksandr V., Кандидат фізико-математичних наукUzunova Vira O., Registration Date 16-11-2020 Organization Institute of Physics of National Academy of Sciences of Ukraine popup.description1 Harnessing fundamental properties of quantum world has already resulted in emergence of new concepts, which are expected to have a huge impact in information technologies. Since most of nonclassical properties are susceptible to noise in quantum channels and imperfections of measurement devices, development of techniques overcoming these difficulties is critically important. Based on results already discussed in literature and on our preliminary considerations, we conclude that there exists a group of nonclassical correlations, which possess the needed property of stability with high degree of certainty. The main objectives of this project consist in building a systematic theory of such correlations and in utilizing them for improvement of quantum communication protocols. Particularly, the following objectives are expected to be achieved: (i) Formulation of an appropriate form for description and characterization of nonclassical correlations, which depend on the available information about measurement devices; (ii) Implementation of factors, which hinder distinguishing between adjacent photon numbers, into the photodetection theory; (iii) Consistent description of long-distance free-space channels and time-domain sub-channels; (iv) Application of the obtained results for formulation of innovative quantum-communication protocols. popup.nrat_date 2024-12-10 Close