


Volume 121, Nº 3-4 (2025)
Articles
Zvezdnaya evolyutsiya i aksionopodobnye chastitsy: novye ogranicheniya i ukazaniya iz analiza sharovykh skopleniy v dannykh Gaia DR3
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Spektral'nye svoystva fotonnogo kristalla s peremennym periodom iz anodnogo oksida alyuminiya
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Odnofotonnoe izluchenie v S-diapazone v tsilindricheskom mikrorezonatore s kvantovymi tochkami InAs/InGaAs
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Generatsiya stabil'nogo femtosekundnogo superkontinuuma v raskhodyashchemsya lazernom puchke dlya vremya-razreshayushchey shirokopolosnoy spektroskopii lazerno-indutsirovannykh protsessov v veshchestve
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Spektroskopicheskoe issledovanie mul'tiferroika LiCoPO4: magnitostrukturnyy fazovyy perekhod
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Vozdeystvie deformatsii na provodimost' kvaziodnomernogo provodnika K0.3MoO3 v payerlsovskom sostoyanii
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Spektral'nye svoystva TGts izlucheniya lateral'no strukturirovannykh spintronnykh istochnikov
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Novyy vysokosimmetrichnyy strukturnyy radiatsionnyy defekt v almaze, vyyavlennyy metodom EPR
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Atypical violation of the Stokes–Einstein relation in a dense binary Lennard–Jones mixture
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We study the dynamics of particles in binary mixtures near the freezing transition using molecular dynamics simulations. The particles are considered to interact via a Lennard-Jones potential, and the impact of varying their size-ratio on their dynamics is examined. By calculating the mean-squared displacements and the self-intermediate scattering function of the particles, we find that introducing size disparity in an equimolar mixture at a constant packing fraction hinders particle movement, leading to a decrease in the self-diffusion coefficient. Additionally, as the size disparity increases, the local cage relaxation time becomes longer. Interestingly, the increase in the system’s viscosity does not correspond to an expected decrease in self-diffusion, resulting in an unusual violation of the Stokes-Einstein relation. Unlike typical glass-forming mixtures, where this violation parameter increases as temperature decreases, we observe the opposite behaviour.



Medlennaya mezhzonnaya rekombinatsiya kak prichina anomal'nogo termoelektricheskogo otklika p−n perekhodov
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Osobennosti provodimosti nominal'no nelegirovannogo monokristallicheskogo CVD almaza
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Opredelenie kharaktera vzaimodeystviya bioaktivnykh ionov s fosfolipidnymi membranami metodami nelineynoy mikroskopii
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Pochemu my ne vidim radiatsionnykh raspadov Ds1+(2536)-mezona?
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Ostsillyatsii v secheniyakh odnoelektronnoy perezaryadki pri stolknoveniyakh polozhitel'nykh ionov s molekuloy vodoroda
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Tsallis–Cirto entropy of black hole and black hole atom
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The quantum tunneling processes related to the black hole determine the black hole thermodynamics. The Hawking temperature is determined by the quantum tunneling processes of radiation of particles from the black hole. On the other hand, the Bekenstein-Hawking entropy of the black hole is obtained by consideration of the macroscopic quantum tunneling processes of splitting of black hole to the smaller black holes. These tunneling processes also determine the composition rule for the black hole entropy, which coincides with the composition rule for the non-extensive Tsallis-Cirto δ = 2 entropy. This composition rule suggests that the mass spectrum of the black hole is equidistant, M = NM0. Here N is an integer number and M0 = √2mP is the mass quantum expressed via the reduced Planck mass mP. The Bekenstein–Hawking entropy of the black hole with mass M = NM0 is SBH(N) = N2.



Coherent transients with a single photon
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Reversible coherent transients induced by a single photon in an ensemble of resonant particles are considered. It can be shown that a phase shift of a single photon wave packet produces its re-emission by these particles. As an example, the resonant interaction of a single gamma-photon with M?ossbauer nuclei is theoretically analyzed. This example has interesting applications in such areas as information transmission and measuring of sub-angstrom vibrations of thin ?lms for creating of sub-angstrom etalon displacements, which can be used for sensor calibration. We show that coherent transients that are governed by the time evolution of a population of nuclear excited states can be detected not only in the transmission of photons through resonant absorbers, but also directly in the time evolution of a population of nuclear excited states. These states experience radiative decay and also emit conversion electrons. The detection of conversion electrons provides information about the excited state population of nuclei located nearby the surface of the radiation incidence on the absorber. This is because of short mean free path (or escape depth) of these electrons in the bulk.



Komp'yuternoe predskazanie chetyrekh perspektivnykh nelineyno-opticheskikh materialov dlya raboty v dlinno- i srednevolnovom ul'trafioletovom diapazonakh
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Svetlo-temnyy parametricheskiy prostranstvenno-vremennoy soliton
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Shirokodiapazonnaya rentgenovskaya diagnostika relyativistskoy lazernoy plazmy
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Topologicheskiy krossover v kiral'noy d + id sverkhprovodyashchey faze pri konechnykh temperaturakh
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Effekt fotonnogo uvlecheniya na granitse metalla i dvumernogo poluprovodnika
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Magnitoelektricheskiy effekt v paramagnetike Nd3Ga5SiO14
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Elektronnye termoelektricheskie svoystva udvoennykh polugeyslerovykh splavov MgXY2Z2 (X = Zr/Hf, Y = Pd/Pt, Z = Bi/Sb)
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Vliyanie mikrochastits selena, medi i serebra, poluchennykh v vyazkikh zhidkostyakh, na vyzhivaemost' grampolozhitel'nykh i gramotritsatel'nykh bakteriy
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