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Dynamic Processes in a Superconducting Adiabatic Neuron with Non-Shunted Josephson Contacts
Symmetry. 2021. Vol. 13. No. 9. Article 1735.
Bastrakova M. V., Gorchavkina Anastasiya, Schegolev A., Кленов Н. В., Соловьев И. И., Satanin Arkady, Tereshonok M.
We investigated the dynamic processes in a superconducting neuron based on Josephson contacts without resistive shunting (SC-neuron). Such a cell is a key element of perceptron-type neural networks that operate in both classical and quantum modes. The analysis of the obtained results allowed us to find the mode when the transfer characteristic of the element implements the “sigmoid” activation function. The numerical approach to the analysis of the equations of motion and the Monte Carlo method revealed the influence of inertia (capacitances), dissipation, and temperature on the dynamic characteristics of the neuron.
Dmitriev A., Kornilov V., Batienkov R., Lecture Notes in Civil Engineering 2026 Vol. 886 P. 249–255
Numerous studies have provided compelling evidence that the probability distribution of avalanche sizes follows a power law, and that 1/f noise is present in the stochastic dynamics of landslides. We present a theoretical explanation of these phenomena within the framework of self-organized criticality theory, proposing a discrete-time model in the form of a sandpile cellular ...
Added: October 13, 2026
Dmitriev A., Shulman I., Lebedev A., Studies in Computational Intelligence 2026 Vol. 1265 P. 266–273
A discrete-time model is presented for the self-organization of the X/Twitter social network to the edge of a phase transition, characterized by avalanche-like propagation of information in the network. The model is based on the analogy between the critical dynamics of the X social network and sandpile cellular automata with Manna rule on the Chung-Lu ...
Added: October 13, 2026
Arutyunov K., Kharitonov I. A., Petrosyants K. O., JETP Letters 2026 Vol. 124 No. 6 P. 1–16
Superconducting properties of metallic micro- and nanowires can be entirely different from those of bulk superconductors. Of particular interest is the nonequilibrium current-induced state of a quasi-one-dimensional superconducting channel. The most interesting phenomenon here is the stepped I–V characteristic, explained by a process known as phase slip center activation. If the origin of such step-like ...
Added: October 13, 2026
Makarov D. M., Kalikin N., Fashchevsky K. A. et al., Electrochimica Acta 2026 Vol. 579 Article 150159
Machine learning (ML) has become a powerful tool for accelerating the development of carbon-based supercapacitors;
however, most published models assume that a single predictive framework can describe both conventional
porous carbons and hybrid carbon electrodes. Here, we test this assumption using a comprehensive
benchmark dataset and an extended literature-curated dataset enriched with synthesis- and electrolyte-related
descriptors. Three ML algorithms ...
Added: October 13, 2026
Махлуф М., Ozhegov R., Elezov M. et al., Фотоника 2026 Vol. 20 No. 6 P. 414–423
This paper compares the ranging precision of direct time-of-flight (dToF) and non-line-of-sight (NLOS) LiDAR architectures, both using a superconducting nanowire single-photon detector (SNSPD). Both systems operate at 1550 nm with a 50 ps pulsed laser and time-correlated single-photon counting (TCSPC). The dToF configuration achieved approximately 100 µm precision at 10 m, while the NLOS configuration achieved 500 µm precision for ...
Added: October 12, 2026
Singapore: Springer, 2026.
This volume presents the Proceedings of the 34th IUPAP Conference on Computational Physics (CCP2023), held in Kobe, Japan on August 4–8, 2023. It offers a collection of peer-reviewed articles that highlight recent developments in computational and simulation research across various areas of physics. Key topics include the use of data science, quantum computing, and machine ...
Added: October 12, 2026
Goncharov A., Chibisov A., Advanced Theory and Simulations 2023 Vol. 12 No. 13 Article 2200816
Designing stable quantum computers with the ability to correct errors responsibly requires a detailed understanding of the physical processes that underlie these devices. In this study, detailed quantum mechanical simulations of the atomic structure, charge distribution of electron density, and distribution and orientation of magnetic and quantum states as a function of applied external pressure ...
Added: October 11, 2026
Sedykh K., Сулеймен Е., Svyatodukh M. et al., Журнал технической физики 2023 Т. 93 № 7 С. 974–979
В работе исследован макет поверхностной ионной ловушки для масштабируемого квантового компьютера
с радиочастотным электродом и сверхпроводящим однофотонным детектором, с рабочей температурой 4K. Диапазон амплитуды радиочастотного сигнала варьировался от 10 до 800mV на частотах от 5 до 20MHz. Исследован эффект влияния наведенного внешнего радиочастотного поля ловушки на скорость темновых и световых отчетов однофотонного детектора. Результаты работы имеют ...
Added: August 23, 2023
Dryazgov M.A., Korneeva Y., Korneev A., Bulletin of the Russian Academy of Sciences: Physics 2022 Vol. 86 No. 6 P. 678–682
An electrothermal model is used to perform a theoretical analysis of the operation of a superconducting detector based on a strip of micrometer width and having photon number resolution. Configurations with series and parallel connections of detector sections are investigated. It is established that when such microstrips are used, a series connection of sections is ...
Added: September 10, 2022
Margaret Polyakova, Sheveleva E., Semenov A. V. et al., IEEE Transactions on Applied Superconductivity 2022 Vol. 32 No. 4 Article 2200204
Abstract—Superconducting nanowire single photon detectors (SNSPD) functionality is based on the local suppression of the su- perconducting order parameter upon photon absorption, causing a change in resistance which can be detected as a DC voltage pulse. Finding the size and the profile of the superconducting order pa- rameter suppression area (the so-called “hot-spot”) experimentally is ...
Added: May 19, 2022
Shcherbatenko M., Elezov M., Manova N. et al., Applied Physics Letters 2021 Vol. 118 Article 181103
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 singlepixel imaging approach and demonstrate a proof-of-principle single-pixel single-photon imaging setup. We overcome the problem of low ...
Added: May 6, 2021
Balygin K. A., Bozhko S. I., Ionov A.M. et al., Moscow University Physics Bulletin 2020 Vol. 75 No. 3 P. 68–73
A measuring complex for recording events by single-photon superconducting detectors based on NbN structures is presented; low-noise high-frequency HEMT transistors are used as cryogenic amplifiers in it. ...
Added: December 6, 2020
Baksheeva K., Vdovydchenko A., Gorshkov K. et al., Journal of Physics: Conference Series 2019 Vol. 1410 No. 1 P. 012076
The radiation of human skin in the terahertz frequency range under the influence of mental stresses has been studied in the current work. An experimental setup for observation of changes in human skin radiation, which occur under the influence of psychological stresses, by means of a superconducting integrated receiver has been developed. More than 30 ...
Added: December 24, 2019
M. Polyakova, Semenov A. V., Kovalyuk V. et al., IEEE Transactions on Applied Superconductivity 2019 Vol. 29 No. 5 P. 1–5
We present a simple quantum detector tomography
protocol, which allows, without ambiguities, to measure the twospot
detection efficiency and extract the hot-spot interaction length
of SNSPDs with unity intrinsic detection efficiency. We identify a
significant parasitic contribution to the measured two-spot efficiency,
related to an effect of the bias circuit, and find a way to rule
out this contribution during data ...
Added: October 23, 2019
Elezov M., Roman Ozhegov, Gregory Goltsman et al., Optics Express 2019 Vol. 27 No. 21 P. 30979–30988
We present an active anti-latching system for superconducting nanowire single-photon detectors. We experimentally test it against a bright-light attack, previously used to compromise security of quantum key distribution. Although our system detects continuous blinding, the detector is shown to be partially blindable and controllable by specially tailored sequences of bright pulses. Improvements to the countermeasure ...
Added: October 23, 2019
Ferrari S., Kovalyuk V., Hartmann W. et al., Optics Express 2017 Vol. 25 No. 8 P. 8739–8750
We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 ...
Added: June 6, 2017
Vetter A., Ferrari S., Rath P. et al., Nano Letters 2016 Vol. 16 No. 11 P. 7085–7092
Ultrafast single-photon detectors with high efficiency are of utmost importance for many applications in the context of integrated quantum photonic circuits. Detectors based on superconductor nanowires attached to optical waveguides are particularly appealing for this purpose. However, their speed is limited because the required high absorption efficiency necessitates long nanowires deposited on top of the ...
Added: February 2, 2017
Arutyunov K., Lehtinen J. S., Physica C: Superconductivity and its Applications 2017 Vol. 533 P. 158–160
Quantum phase slip (QPS) is the topological singularity of the complex order parameter of a quasi-one- dimensional superconductor: momentary zeroing of the modulus and simultaneous ’slip’ of the phase by ±2 π. The QPS event(s) are the dynamic equivalent of tunneling through a conventional Josephson junction containing static in space and time weak link(s). Here ...
Added: March 22, 2016
Arutyunov K., Lehtinen J. S., Rantala T., Journal of Superconductivity and Novel Magnetism 2016 Vol. 29 No. 3 P. 569–572
Quantum phase slip (QPS) is the particular manifestation
of quantum fluctuations of the order parameter
of a quasi-1D superconductor. The QPS event(s) can be
considered a dynamic equivalent of tunneling through conventional
Josephson junction containing static in space and
time weak link(s). At low temperaturesT << Tc, the QPS
effect leads to finite resistivity of narrow superconducting
channels and suppresses persistent currents ...
Added: March 22, 2016
Ozhegov R., Горшков К. Н., Окунев О. В. et al., М.: МПГУ, 2014.
Монография посвящена актуальной проблеме современной радиофизике: построение радиоизображений в терагерцовом диапазоне частот. Неоспоримые преимущества использования терагерцовой системыпостроения радиоизображений во многих областях от медицины и системы безопасности до навигации в условиях плохой видимости делает эту работу особенно актуальной. Продемонстрированы супергетгродинные тепловизеры терагерцового диапазона частот двух типов. В первом использован супергетеродинный приемник на основе сместителя на эффекте ...
Added: February 26, 2016
Chulkova G., Korneev A., Goltsman G. et al., М.: МПГУ, 2014.
Монография посвящена актуальной проблеме эффекта однофотонного детектирования света видимого и ИК диапазонов структурами субмикронных размеров, изготовленными из тонких сверхпроводящих плёнок в условии протекания через них тока близкого к критическому току распаривания. ...
Added: February 25, 2016
Korneeva Y., Sidorova M., Semenov A. et al., IEEE Transactions on Applied Superconductivity 2016 Vol. 26 No. 3 P. 1–4
We report an experimental investigation of the hot spot evolution in superconducting single photons detectors (SSPDs) made of disordered superconducting materials with different diffusivity and energy down-conversion time: 33-nmthickNbN and 23-nm-thick NbC films. We have demonstrated that in NbC film only 405 nm photons produce sufficiently largehot-spot to trigger a single-photon response. The dependence of ...
Added: October 9, 2015
Korneeva Y., Mikhailov M., Pershin Y. et al., Superconductor Science and Technology 2014 Vol. 27 No. 9 P. 095012
We fabricated and characterized nanowire superconducting single-photon detectors made of 4 nm thick amorphous Mo x Si1−x films. At 1.7 K the best devices exhibit a detection efficiency (DE) up to 18% at 1.2 <img /> wavelength of unpolarized light, a characteristic response time of about 6 ns and timing jitter of 120 ps. The ...
Added: March 31, 2015
Трифонов А. В., Аверьев Н. В., Чараев И. А. et al., Труды МФТИ, Россия, Москва 2014 Т. 6 № 1 С. 20
Работа посвящена сравнению с экспериментом модели термически активированных одиночных вихрей, описывающей темновой счет сверхпроводникового однофотонно- го детектора. Получено, что модель достаточно хорошо описывает зависимость числа темновых отсчетов в единицу времени от тока смещения, если последний достаточно близок к критическому току (𝐼𝑏 ≥ 0.9𝐼𝑐). ...
Added: March 16, 2015