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Фокусировка атомного пучка для эффективной загрузки атомного чипа
Письма в Журнал экспериментальной и теоретической физики. 2022. Т. 115. № 9. С. 562–570.
A method has been proposed to increase the rate of loading of atoms in a U-magneto-optical trap near an atom chip. The method is based on the focusing of a slow atomic beam into the localization region of the atom chip. The overdamped focusing regime has been considered. In this case, the focal length is independent of the initial transverse velocity of atoms. It has been shown that the focusing of the atomic beam makes it possible to increase the loading rate in the localization region 250 μm in diameter by a factor of 160.
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
Chibisov A., Gnidenko A., Chibisova M. et al., FlatChem 2023 Vol. 41 Article 100533
Manufacturing precise quantum computers with small errors in quantum operations, long coherence times, and low power consumption is the most important challenge in modern nanoelectronics. To understand the operating modes of such calculators in detail, both the optimal arrangement of the qubit system within the structure and changes in its magnetic properties must be comprehensively ...
Added: October 11, 2026
Afanasyev A., Bykova D., Balykin V. I., Наноиндустрия 2025 Т. 18 № S11-2(135) С. 529–539
Quantum systems can be used for various physical feld sensing. Such sensors achieve the greatest accuracy and sensitivity with their coherent control. Cold and ultracold atoms are promising for creating quantum sensors of inertial felds. The atom chip platform, which has smaller dimensions and energy consumption, is promising for creating transportable quantum sensors based on ...
Added: November 13, 2025
Bykova D., Afanasyev A., Balykin V. I., Письма в Журнал экспериментальной и теоретической физики 2023 Т. 118 № 1 С. 7–13
В работе рассмотрена фокусировка атомного пучка с использованием двумерной магнито-оптической ловушки с целью увеличения количества атомов в области их лазерного охлаждения и локализации вблизи атомного чипа. Рассмотрены два режима взаимодействия атомов с фокусирующим лазерным полем: (1) доплеровский режим взаимодействия, который реализуется при малых отстройках лазерного поля от частоты атомного резонанса и (2) суб-доплеровский режим взаимодействия, который реализуется ...
Added: November 13, 2024
Skakunenko P., Darya Bykova, Anton Afanasiev et al., Chinese Optics Letters 2024 Vol. 22 No. 6 Article 060201
We developed a new single-layer atom chip with an additional U-shaped current-carrying structure. The new U-shaped microwire creates optimized magnetic field distribution, which increases the trapping volume of a magneto-optical trap (MOT) near the chip. Our approach allows one to localize more atoms, while a setup remains relatively simple (single-layer approach) and consumes low current ...
Added: November 13, 2024
Afanasyev A., Скакуненко П. И., Bykova D. et al., Успехи физических наук 2024 Т. 194 № 11 С. 1146–1158
The first atom chip in Russia — a device for cooling, trapping, and controlling neutral atoms — was created at the Institute of Spectroscopy, Russian Academy of Sciences. Atom chips are a platform for creating quantum sensors based on ultracold atoms. Atom chip technology underlies experiments with atoms in the state of Bose-Einstein condensation currently ...
Added: November 11, 2024
Zelener B. B., Vilshanskaya E. V., Morozov N. V. et al., Physical Review Letters 2024 Vol. 132 No. 11 Article 115301
In this Letter we discuss our approach that makes possible creation of the steady-state ultracold plasma having various densities and temperatures by means of continuous two-step optical excitation of calcium atoms in the magneto-optical trap. A strongly coupled ultracold plasma can be used as an excellent test platform for studying many-body interactions associated with various ...
Added: March 16, 2024
Скакуненко П. И., Bykova D., Afanasyev A. et al., Письма в Журнал экспериментальной и теоретической физики, Россия 2024 Т. 119 № 1-2 С. 20–26
В работе исследованы различные режимы загрузки магнито-оптической ловушки (МОЛ), сформированной вблизи атомного чипа, на примере атомов 87Rb. Исследована загрузка из тепловых атомных паров и из низкоскоростного атомного пучка. При использовании атомного пучка продемонстрирована возможность контроля загрузки МОЛ пространственным управлением атомного пучка. Это позволило увеличить скорость загрузки атомов в МОЛ при сохранении ультравысокого вакуума в области ...
Added: November 23, 2023
Bronin S. Y., Vikhrov E. V., Saakyan S. et al., Physics of Plasmas 2024 Vol. 31 No. 3 Article 033507
Calculations of the spectrum of eigen oscillations of an inhomogeneous ultracold plasma are presented both in the absence and in the presence of charge imbalance. The collective modes of these plasma oscillations are recorded in experiments as absorption resonances of a radio frequency electric field. It is shown that in the presence of friction of ...
Added: February 13, 2023
Anton E.Afanasiev, Alexey S.Kalmykov, Kirtaev R. et al., Optics and Laser Technology 2022 Vol. 148 Article 107698
A single-layer atom chip for laser cooling and trapping of atoms which operates in a continuous regime is designed and experimentally investigated. The continuous regime was achieved by optimizing the processes of heat released and heat removal from the working area of the atom chip. To do this, we use silver microwires and optimization of ...
Added: August 15, 2022