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of 3 151
pro vyhledávání: '"Kalashnikov, V."'
Autor:
Sorokin, E., Okhrimchuk, A., Tolstik, N., Smayev, M., Likhov, V., Kalashnikov, V. L., Sorokina, I. T.
We report the first direct femtosecond laser-writing of buried channel waveguides in monocrystalline ZnS. We also report the first single-mode Cr:ZnS depressed cladding buried waveguide laser manufactured by femtosecond laser writing. The laser yield
Externí odkaz:
http://arxiv.org/abs/2212.00905
Autor:
Cherkas, S. L., Kalashnikov, V. L.
Publikováno v:
Phys. Scr. 96 (2021) 115001
Effects of the quantum gravity under Minkowski space-time background are considered. It is shown that despite the absence of the complete theory of quantum gravity, some concrete predictions could be made for the influence of the quantum gravitationa
Externí odkaz:
http://arxiv.org/abs/2012.02288
Autor:
Kalashnikov, V. L., Wabnitz, S.
Publikováno v:
Europhysics Letters, Vol. 133, 34002 (2021)
We demonstrate the stabilization of two-dimensional nonlinear wave patterns by means of a dissipative confinement potential. Our analytical and numerical analysis, based on the generalized dissipative Gross-Pitaevskii equation, makes use of the close
Externí odkaz:
http://arxiv.org/abs/2010.11165
Autor:
Mangini, F., Ferraro, M., Zitelli, M., Kalashnikov, V., Niang, A., Mansuryan, T., Frezza, F., Tonello, A., Couderc, V., Aceves, A. B., Wabnitz, S.
We demonstrate a new practical approach for generating multicolour spiral-shaped beams. It makes use of a standard silica optical fibre, combined with a titled input laser beam. The resulting breaking of the fibre axial symmetry leads to the propagat
Externí odkaz:
http://arxiv.org/abs/2010.00487
Autor:
Cherkas, S. L., Kalashnikov, V. L.
Publikováno v:
Universe 2020, 6(5), 67
We argue that the problem of time is not a crucial issue inherent in the quantum picture of the universe evolution. On the minisuperspace model example with the massless scalar field, we demonstrate four approaches to the description of quantum evolu
Externí odkaz:
http://arxiv.org/abs/2003.11284
Publikováno v:
Human Rights Case Digest. Nov2001, Vol. 12 Issue 11/12, p999-1001. 3p.
Publikováno v:
Fortschr. Phys. 68 (2020) 2000047
An extended framework of gravity, in which the first Friedmann equation is satisfied up to some constant due to violation of gauge invariance, is tested against astrophysical data: Supernovae Type-Ia, Cosmic Chronometers, and Gamma-ray bursts. A gene
Externí odkaz:
http://arxiv.org/abs/1912.09224
Autor:
Cherkas, S. L., Kalashnikov, V. L.
Publikováno v:
Nonlin. Phenom. Complex Syst. 25 (2022) 266-275
It is shown how to place some amount of matter into the cosmological singularity and to encode its state. A free and massless scalar field is considered as a prototype of matter. Two different but coherent approaches to this issue are presented. The
Externí odkaz:
http://arxiv.org/abs/1905.06790
Akademický článek
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Autor:
Cherkas, S. L., Kalashnikov, V. L.
Publikováno v:
Nonlin. Phenom. Complex Syst. 23 (2020) 332-337
The vacuum is considered as some fluid emergent from the zero-point fluctuations of the quantum fields contributing to the vacuum energy density and pressure. The equation of vacuum state and the speed of vacuum sound-waves are deduced under the assu
Externí odkaz:
http://arxiv.org/abs/1810.06211