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Modulation transfer spectroscopy of 7Li D1 line
Journal of Quantitative Spectroscopy and Radiative Transfer. 2025. No. 346. Article 109594.
Khalutornykh L., Saakyan S., Nazarov A., Zelener B.
We present the first implementation of modulation transfer spectroscopy (MTS) on the D1 line of 7 Li, carried
out in a compact heat-pipe vapor cell with cold windows. By varying the pump and probe intensities and
polarization configurations, we systematically map the MTS error-signal amplitude, effective linewidth, and
slope for the ground-state crossover resonance 𝐹 = 1 × 2 → 𝐹 ′ = 2. We observe Rabi-induced power broadening
and identify optimal conditions for laser frequency stabilization via tightly focused beams with total power
below 1 mW. The lin⟂lin polarization configuration yields a sharp, symmetric, high-contrast error signal with
a maximal slope. Our findings establish the MTS spectrum of the 7 Li D1 line transitions as a reliable frequency
reference for quantum technology and ultracold atom experiments, particularly in scenarios where frequency
stabilization must be achieved with low laser optical power.
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
Tan J., Jiang X., Xiao S. et al., Journal of Alloys and Compounds 2025 Vol. 1039 Article 183129
Cylindrical shock loading has significant effects on the plasticity and phase transition of iron-based alloys. However, due to the limitations of loading technology and detection methods in experiments, the plasticity and phase transition laws of alloys under cylindrical shock are unclear. In this work, large-scale nonequilibrium molecular dynamics (NEMD) simulation was applied to study the ...
Added: August 19, 2025
Анциферов П. С., Степанов Л. В., Матюхин Н. Д., Plasma Physics Reports 2024 Vol. 50 No. 6 P. 742–748
The emission dynamics of a vacuum spark with a peak current of ~50 kA in the wavelength range of λ = 5–40 nm is analyzed. The radiation was detected by means of the microchannel-plate detectors with a frame temporal resolution of 20 ns. The technique of simultaneous acquisition of the spatial distribution and spectrograms of ...
Added: September 24, 2024
Saakyan S., D'yachkov L., Klimov S. et al., Spectrochimica Acta - Part B: Atomic Spectroscopy 2022 Vol. 195 Article 106503
We report the accurate quantitative measurements of the photoionization (PI) cross section of lithium-7 confined in a magneto-optical trap (MOT). The losses from the MOT induced by radiation of the low-power light-emitting diodes (LEDs) are measured as a function of the photoionizing radiation intensity. On the basis of these measurements, the PI cross section from ...
Added: July 30, 2022
Saakyan S.A., Vilshanskaya E. V., Galstyan K. P. et al., Measurement Science and Technology 2021 Vol. 32 No. 11 Article 115501
We report the measurement of the photoionization (PI) cross section of the lithium 2P3/2 state in a magneto-optical trap (MOT) using a UV-light-emitting diode (LED). Losses from the lithium MOT induced by additional radiation ionizing the atoms in the 2P3/2 state have been measured as a function of the intensity of the LED. The experiments have been ...
Added: August 4, 2021
Sautenkov V. A., Shneider M. N., Saakyan S. A. et al., Optics Communications 2019 Vol. 431 P. 131–135
Self-focusing of cw laser beam in a rubidium atomic vapor was studied. The beam radius and power at the entrance of a rubidium vapor cell were variable parameters. A steep grow of the self-focusing threshold power for the small beam radius (≤ 30 μ m) was observed. Our experimental data are in a qualitative agreement ...
Added: October 26, 2019
Zharkov M. Y., Боровицкая И. В., Люблинский И. Е. et al., Перспективные материалы 2014 № 5 С. 27–33
The corrosion resistance of vanadium alloys (V- 1,86Ga, V- 3,4Ga- 0,62 Si, V- 4,81Ti- 4,82Cr) in the liquid high purity lithium (carbon and nitrogen less than 1 • 10 -3 wt.%, oxygen ~ 0.02-0.03 wt.%) in comparison with the pure vanadium has been studied. Corrosion tests were carried out in the static isothermal conditions at ...
Added: October 11, 2014