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7 results on '"A A Feimov"'

1. Certified Quantum Random Numbers from Untrusted Light

Author

Drahi, David, Walk, Nathan, Hoban, Matty J., Fedorov, Aleksey K., Shakhovoy, Roman, Feimov, Akky, Kurochkin, Yury, Kolthammer, W. Steven, Nunn, Joshua, Barrett, Jonathan, and Walmsley, Ian A.

Subjects
Quantum Physics
Abstract

A remarkable aspect of quantum theory is that certain measurement outcomes are entirely unpredictable to all possible observers. Such quantum events can be harnessed to generate numbers whose randomness is asserted based upon the underlying physical processes. We formally introduce, design and experimentally demonstrate an ultrafast optical quantum random number generator that uses a totally untrusted photonic source. While considering completely general quantum attacks, we certify and generate in real-time random numbers at a rate of $8.05\,$Gb/s with a rigorous security parameter of $10^{-10}$. Our security proof is entirely composable, thereby allowing the generated randomness to be utilised for arbitrary applications in cryptography and beyond. To our knowledge, this represents the fastest composably secure source of quantum random numbers ever reported., Comment: 37 pages, 7 figures. New substantial material has been added and the title was modified accordingly more...

Published
2019
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3. Certified Quantum Random Numbers from Untrusted Light

Author

Drahi, David, primary, Walk, Nathan, additional, Hoban, Matty J., additional, Fedorov, Aleksey K., additional, Shakhovoy, Roman, additional, Feimov, Akky, additional, Kurochkin, Yury, additional, Kolthammer, W. Steven, additional, Nunn, Joshua, additional, Barrett, Jonathan, additional, and Walmsley, Ian A., additional more...

Published
2020
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5. Registration of the quantum state of a single photon to create a satellite quantum network

Author

A A Feimov, V L Kurochkin, V F Mayboroda, A. V. Miller, Y V Kurochkin, V V Krushinsky, M. Y. Balanov, I V Petrov, A V Khmelev, and A A Popov

Subjects
Physics, SINGLE-PHOTON DETECTORS, TRACKING ERRORS, History, Quantum network, Photon, PARTICLE BEAMS, GROUND RECEIVERS, PHOTONS, OPTICAL SIGNALS, Computer Science Applications, Education, Computational physics, COMMUNICATION SATELLITES, Quantum state, Physics::Space Physics, COMMUNICATION LINES, RECEIVING SYSTEM, Satellite, ORBITS, QUANTUM CRYPTOGRAPHY, SATELLITES, LOW EARTH ORBIT SATELLITES, SINGLE-PHOTON LEVEL
Abstract

Artificial satellites employed as trusted nodes can increase the distance between two parties to establish quantum key distribution (QKD), unlike fiber based communication lines that are limited up to a few hundred kilometers. This report summarises our progress on a ground receiver for satellite QKD and its tracking receiving system (TRS). The authors demonstrate the operation of the TRS in practice and achieve standard tracking error of 1.4/Ltrad observing four satellites over 80% of the time they were available. The optical signal, which was the sunlight reflected of low Earth orbit satellites, was attenuated to a single photon level and was detected effectively using avalanche single photon detectors. The authors have thus proved that the developed system is capable of stable reception of quantum signal from a satellite. © Published under licence by IOP Publishing Ltd. This work is supported by Russian Science Foundation (grant No. 17-71-20146). more...

Published
2020

6. Registration of the quantum state of a single photon to create a satellite quantum network

Author

Kurochkin, V. L., Khmelev, A. V., Petrov, I. V., Miller, A. V., Feimov, A. A., Mayboroda, V. F., Balanov, M. Y., Krushinsky, V. V., Popov, A. A., Kurochkin, Y. V., Kurochkin, V. L., Khmelev, A. V., Petrov, I. V., Miller, A. V., Feimov, A. A., Mayboroda, V. F., Balanov, M. Y., Krushinsky, V. V., Popov, A. A., and Kurochkin, Y. V. more...

Abstract

Artificial satellites employed as trusted nodes can increase the distance between two parties to establish quantum key distribution (QKD), unlike fiber based communication lines that are limited up to a few hundred kilometers. This report summarises our progress on a ground receiver for satellite QKD and its tracking receiving system (TRS). The authors demonstrate the operation of the TRS in practice and achieve standard tracking error of 1.4/Ltrad observing four satellites over 80% of the time they were available. The optical signal, which was the sunlight reflected of low Earth orbit satellites, was attenuated to a single photon level and was detected effectively using avalanche single photon detectors. The authors have thus proved that the developed system is capable of stable reception of quantum signal from a satellite. © Published under licence by IOP Publishing Ltd. more...

Published
2020

7. Single-pixel camera with a large-area microstrip superconducting single photon detector on a multimode fiber

Author

N. Simonov, N. N. Manova, Yu. P. Korneeva, M. Elezov, Denis Sych, M. Dryazgov, K. Sedykh, G.N. Gol'tsman, Alexander Korneev, M. Shcherbatenko, and A. Feimov

Subjects
010302 applied physics, Physics, Optical fiber, Photon, Multi-mode optical fiber, Physics and Astronomy (miscellaneous), Physics::Instrumentation and Detectors, business.industry, Near-infrared spectroscopy, Detector, Physics::Optics, Ranging, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Microstrip, law.invention, Optics, law, 0103 physical sciences, Microscopy, 0210 nano-technology, business
Abstract

High sensitivity imaging at the level of single photons is an invaluable tool in many areas, ranging from microscopy to astronomy. However, development of single-photon sensitive detectors with high spatial resolution is very non-trivial. Here we employ the single-pixel imaging approach and demonstrate a proof-of-principle single-pixel single-photon imaging setup. We overcome the problem of low light gathering efficiency by developing a large-area microstrip superconducting single photon detector coupled to a multi-mode optical fiber interface. We show that the setup operates well in the visible and near infrared spectrum, and is able to capture images at the single-photon level. more...

Published
2021
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