Zobrazeno 1 - 10
of 5 515
pro vyhledávání: '"Pushkarev, A. A."'
The spectral form factor is believed to provide a special type of behavior called "dip-ramp-plateau" in chaotic quantum systems which originates from the random matrix theory. A similar behavior could be observed for deterministic systems, ranging fr
Externí odkaz:
http://arxiv.org/abs/2412.19672
We analyze the variability of the parsec-scale jet directions in active galactic nuclei (AGNs). Our analysis involves 317 AGNs at frequencies ranging from 2 to 43 GHz, and is made possible by developing an automatic inner jet direction measurement pr
Externí odkaz:
http://arxiv.org/abs/2409.12309
Autor:
Marunchenko, Alexandr, Kumar, Jitendra, Tatarinov, Dmitry, Pushkarev, Anatoly, Vaynzof, Yana, Scheblykin, Ivan
Time-resolved photoluminescence is a validated method for tracking the photoexcited carrier dynamics in luminescent materials. This technique probes the photoluminescence decays upon a periodic excitation by short laser pulses. Herein, we demonstrate
Externí odkaz:
http://arxiv.org/abs/2408.05009
Autor:
Chestnov, Igor, Masharin, Mikhail, Kondratyev, Valeriy, Iorsh, Ivan, Samusev, Anton, Pushkarev, Anatoly, Makarov, Sergey, Shelykh, Ivan A., Shahnazaryan, Vanik
Halide perovskites, such as methylammonium lead bromide (MAPbBr$_3$), host tightly bound three-dimensional excitons which are robust at room temperature. Excellent optical properties of MAPbBr$_3$ allow for designing of optical single-mode waveguides
Externí odkaz:
http://arxiv.org/abs/2407.15709
The interaction of light with solids can be dramatically enhanced owing to electron-photon momentum matching. This mechanism is driven by either quantum confinement or long-range structural correlations in media with crystal-liquid duality. In this p
Externí odkaz:
http://arxiv.org/abs/2405.06084
Autor:
Rizaev, Georgy, Pushkarev, Dmitrii, Levus, Maximilian, Vrublevskaya, Nadezhda, Seleznev, Leonid
An experimental study of laser pulse duration influence on the terahertz emission during single-color filamentation is carried out. It is shown that for each terahertz frequency there is an optimal laser pulse duration providing maximal generation at
Externí odkaz:
http://arxiv.org/abs/2405.04413
Publikováno v:
A&A 692, A127 (2024)
High-resolution VLBI observations revealed a quasi-stationary component (QSC) in the relativistic jets of many blazars, which represents a standing recollimation shock. The VLBA monitoring of the BL Lacertae jet at 15~GHz shows the QSC at a projected
Externí odkaz:
http://arxiv.org/abs/2404.18330
Autor:
Geints, Yu. E., Geints, I. Yu., Grudzin, Ya. V., Koribut, A. V., Pushkarev, D. V., Rizaev, G. E., Seleznev, L. V.
Filamentation of high-power femtosecond laser pulses in air is accompanied by a fairly strong release of optical energy into the propagation medium due to laser-induced ionization of air molecules and production of an underdense plasma of charged spe
Externí odkaz:
http://arxiv.org/abs/2403.00242
Publikováno v:
Astronomicheskii Zhurnal, 2023, V. 100, N. 12, pp. 1132-1143
The latest results of the most detailed analysis of multi-epoch polarization-sensitive observations of active galactic nuclei (AGN) jets at parsecs scales by very long baseline interferometry (VLBI) reveal several characteristic patterns of linear po
Externí odkaz:
http://arxiv.org/abs/2402.07500
Autor:
E., Nokhrina E., B, Pushkarev A.
Publikováno v:
2024, MNRAS, 528, 2523-2532
The core shift method is a powerful method to estimate the physical parameters in relativistic jets from active galactic nuclei. The classical approach assumes a conical geometry of a jet and a constant plasma speed. However, recent observations show
Externí odkaz:
http://arxiv.org/abs/2401.06698