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Атомная дипольная импульсная ловушка со спектральной фильтрацией лазерного излучения
Квантовая электроника. 2020. Т. 50. С. 530–536.
Гущина В. А., / Series chemrxiv-2023-vpzhz-v2 "ChemRxiv". 2023.
All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are being intensively studied due to their unique properties and wide range of applications; however, however, the nature of their optical properties is not yet fully understood due to the difficulty of synthesis of singlephase nanoparticles. In this article we describe the features of the synthesis of single-phase particles ...
Added: May 14, 2026
Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
Added: April 20, 2026
Sautenkov V., Saakyan S., Bobrov A. et al., Journal of Quantitative Spectroscopy and Radiative Transfer 2026 Vol. 351 Article 109796
We discuss nonlinear spectra of selective reflection from high-density rubidium atomic vapor, where the self-broadening of the resonant transition 5S1/2 - 5P3/2 dominates over the Doppler width. In the experiments, the hole-burning technique with probe and pump lasers is used. The reflection of weak probe beam is investigated at four atomic densities in the range ...
Added: January 11, 2026
Sautenkov V., Saakyan S., Bobrov A. et al., Journal of Quantitative Spectroscopy and Radiative Transfer 2024 Vol. 328 Article 109153
We study the resonant saturation of selective reflection at the interface between a transparent dielectric and high-density rubidium vapor on the D2-line. Our estimates suggest that, within the selected atomic density range, the dipole–dipole self-broadening of the line can vary from 13.2 to 39.6 GHz. Two tunable lasers are used as sources of pump and ...
Added: March 10, 2025
Kagan M., Silkin V. M., Efremov D. V., / Series arXiv "math". 2024. No. 2411.12836.
In this study, we analyze the dielectric function of high-Tc cuprates as a function of doping level, taking into account the full energy band dispersion within the CuO2 monolayer. In addition to the conventional two-dimensional (2D) gapless plasmon mode, our findings reveal the existence of three anomalous branches within the plasmon spectrum. Two of these branches ...
Added: November 27, 2024
Influence of anisotropy on the study of critical behavior of spin models by machine learning methods
Sukhoverkhova D., Shchur L., / Series arXiv "math". 2024. No. 2410.14523.
In this paper, we applied a deep neural network to study the issue of knowledge transferability between statistical mechanics models. The following computer experiment was conducted. A convolutional neural network was trained to solve the problem of binary classification of snapshots of the Ising model's spin configuration on a two-dimensional lattice. During testing, snapshots of ...
Added: October 21, 2024
Mozolenko V., Fadeeva Marina, Shchur L., / Series arXiv "math". 2024. No. 2405.10865.
The development of new algorithms for simulations in physics is as important as the development of new analytical methods. In this paper we present a comparison of the recently developed microcanonical population annealing (MCPA) algorithm with the rather mature Wang-Landau algorithm. The comparison is performed on two cases of the Potts model exhibiting a first ...
Added: May 20, 2024
Kagan M., Аксёнов С. В., / Series Research Square "Research Suqare". 2024. No. 1.
We study different resonances (first of all of the Fano type) in the interference device formed by the Aharonov-Bohm ring with superconducting (SC) wire in the topologically nontrivial state playing a role of a bridge between top and bottom arms. We analyze Majorana modes on the ends of the SC wire and show that the collapse of the ...
Added: April 10, 2024
Ребров Я. В., Glazkov V., Murtazoev A. F. et al., / Series cond-mat "arxiv.org". 2023.
Nabokoite family compounds ACu7(TeO4)(SO4)5Cl (A=Na, K, Cs, Rb) are one of the candidates for the evasive spin-liquid state predicted for highly-frustrated square kagome lattice (SKL). Their magnetic subsystem includes SKL layers decorated by additional copper ions. All members of this family are characterized by quite high Curie-Weiss temperatures (∼80−200 K), but magnetic ordering was reported ...
Added: January 29, 2024
Shurakov A., Kaurova N., Belikov I. et al., / Series Physics "arxiv.org". 2022.
In this paper, we report on the method of nondestructive quality control that can be used in fabrication of GaAs high-speed electronics. The method relies on the surface potential mapping and enables rigid in vivo analysis of transport properties of an active electronic device incorporated into a complex integrated circuit. The study is inspired by ...
Added: September 15, 2023
Бобров А. А., Saakyan S., Саутенков В. А. et al., Письма в Журнал экспериментальной и теоретической физики 2021 Т. 114 № 9 С. 604–607
The dipole–dipole broadening of the spectrum of the selective reflection of intense resonance light from the interface between a transparent dielectric and a gas of the natural mixture of Rb isotopes has been studied experimentally. The case of a high gas density where the Doppler broadening can be neglected has been investigated. It has been ...
Added: February 5, 2023
Бармина Е. В., Жильникова М. И., Айыыжы К. О. et al., Доклады Российской академии наук. Физика, технические науки (ранее - Доклады Академии Наук. Физика) 2022 Т. 502 № 1 С. 10–14
Методом КАРС-спектроскопии экспериментально исследовано распределение температуры в пламени при диффузионном горении в кислороде изопропанола и изопропанола с наночастицами бора
с концентрацией 0.5% по массе. Обнаружено, что добавка наночастиц бора в топливо приводит к
увеличению температуры во фронте пламени на 150 К. ...
Added: December 12, 2022
Pugach N., Safonchik M. O., Belotelov V. et al., / Series "cond-mat". 2022. No. 2110.00369.
A detailed investigation of a superconducting spin-triplet valve is presented. This spin-valve consists of a superconducting film covering a metal with an intrinsic spiral magnetic order, which could result from competing isotropic exchanges or, if the crystal lattice breaks central symmetry, from asymmetric Dzyaloshinskii-Moriya exchange. Depending on the anisotropy, such a metal may change its ...
Added: November 16, 2022
Novikov S. V., / Series cond-mat "arxiv.org". 2022. No. 2209.14955.
Charge transport in amorphous semiconductors having spatially correlated exponential density of states (DOS) has been considered for the arbitrary behavior of the correlation function of random energies. Average carrier velocity is exactly calculated for the quasi-equilibrium (nondispersive) transport regime. For the symmetric exponential DOS with exponential tails for low and high energies and non-positive correlation ...
Added: November 1, 2022
Ikhsanov R., Mazur E., Kagan M., / Series "Working papers by Cornell University". 2022. No. 2202.01452.
At present, the task of searching for compounds with a high superconducting transition temperature is a very relevant scientific direction. Usually, the calculation of is carried out by numerically solving the system of Eliashberg equations. In this paper, a set of programs for solving this system written in various forms on the imaginary axis is ...
Added: February 4, 2022
Afanasyev A., Balykin V. I., Квантовая электроника 2021 Т. 51 № 3 С. 248–253
We report a theoretical analysis of the spectral properties of atoms localised in an optical pulsed trap. It is shown that this analysis can be carried out using the correlation coefficient calculated from the averaged dynamics of atomic excitation by resonant probe laser light in the presence of a nonresonant pulsed field. It follows from ...
Added: October 29, 2021
Budkov Y., Zavarzin S., Kolesnikov A. L., Journal of Physical Chemistry C 2021 Vol. 125 No. 38 P. 21151–21159
We formulate a general mean-field theory for a flat electric double layer in ionic liquids and electrolyte solutions with ions possessing static polarizability and a permanent dipole moment on a charged electrode. We establish a new analytical expression for electric double-layer differential capacitance, determining it as an absolute value of the ratio of the local ...
Added: September 16, 2021
Sanina N., Isaeva U., Utenyshev A. et al., Inorganica Chimica Acta 2021 Vol. 527 Article 120559
A new inhibitor of phosphodiesterase (PDE), i.e., nitric oxide (NO) donor, a water soluble DNIC Na[Fe(C7H5N4S)2(NO)2]⋅2.5H2O (1), has been synthesized. The structure of the new complex, its physical-chemical properties in the solid state and in solutions have been studied experimentally (X-ray analysis, IR, UV-Vis, Mossbauer spectroscopy, mass-spectrometry, and amperometry) and theoretically (quantum-chemical modeling by DFT ...
Added: September 16, 2021
Sautenkov V., Saakyan S., Zelener B., Journal of Quantitative Spectroscopy and Radiative Transfer 2020 Vol. 256 P. 1–6
We report an experimental study of nonlinear radiation trapping in a high-density rubidium vapor where the self-broadening of the resonance transitions 5S1/2 − 5P3/2 exceeded the Doppler broadening. The atomic number densities used were N1 = 3 × 10^16 cm^−3 and N2 = 8 × 10^16 cm^−3. In our experiment, a signal of retro-fluorescence was ...
Added: June 21, 2021
A.E. Afanasiev, A.M. Mashko, A.A. Meysterson et al., Квантовая электроника 2020 Т. 50 С. 206–212
В данной работе проведено исследования спектральных свойств атомов, локализованных в оптическом дипольной ловушке методом их спектрально- селективного нагрева пробным полем. В основе метода лежит измерение количества атомов в ловушке после их взаимодействия с пробным полем. Зависимость количества атомов от частоты пробного поля полностью характеризует сдвиг и ширину спектральной линии поглощения локализованных атомов. ...
Added: January 18, 2021
A.E. Afanasiev, A.M. Mashko, A.A. Meysterson et al., Письма в Журнал экспериментальной и теоретической физики 2020 Т. 111 С. 757–762
В данной работе экспериментально исследованы спектральные свойства атомов, локализованных в оптической дипольной ловушке, образованной импульсным излучением фемтосекундной длительности. Показано, что сдвиг линии поглощения атома, обусловленный взаимодействием атома с полем локализующего излучения, совпадает со сдвигом линии атома, локализованного в поле непрерывного лазерного излучения. Теоретический анализ показывает, что при использовании экспериментально достижимых параметров импульсного излучения, таких как ...
Added: January 18, 2021
Бобров А. А., Saakyan S., Саутенков В. А. et al., Квантовая электроника 2018 Т. 48 № 5 С. 438–442
A technique is proposed for studying the thermal motion of Li-7 atoms in a magneto-optical trap (MOT), based on a comparative analysis of coherent two-photon resonances at the 2S-2P-nS (n = 38-120) transition using counter- and co-propagating laser beams with wavelengths of 671 and 350 nm (differential two-photon spectroscopy). A self-consistent theoretical model is constructed. ...
Added: October 26, 2019
Будылин Г. С., Ровнягина Н. Р., Тихонова Т. Н. et al., В кн.: Научная конференция "ЛОМОНОСОВСКИЕ ЧТЕНИЯ". Секция физики. 15-25 апреля 2019.: М.: Физический факультет МГУ им. М.В. Ломоносова, 2019. С. 56–58.
Термин амилоидоз обозначает группу заболеваний, вызванных неправильно
свернутыми белками, которые накапливаются в определенных тканях и органах и
приводят к нарушению их нормальных функций. Амилоидоз сопутствует диабету второго
типа, атеросклерозу, болезням Альцгеймера, Паркинсона и др. Неправильно свернутые
белки могут терять свои нативные свойства и образовывать нерастворимые агрегаты,
которые называются амилоидными фибриллами и характеризуются структурой, богатой
бета-листами. Они могут достигать 10-20 нм в ...
Added: May 15, 2019