Zobrazeno 1 - 10
of 186
pro vyhledávání: '"Vladimir L. Kalashnikov"'
Publikováno v:
Universe, Vol 9, Iss 12, p 508 (2023)
Grassmann variables are used to formally transform a system with constraints into an unconstrained system. As a result, the Schrödinger equation arises instead of the Wheeler–DeWitt one. The Schrödinger equation describes a system’s evolution,
Externí odkaz:
https://doaj.org/article/11d055e875a84f32afbf9f45ea974c44
Publikováno v:
Universe, Vol 9, Iss 9, p 424 (2023)
Eicheon properties are discussed. It is shown that the eicheon surface allows setting a boundary condition for the vacuum polarization and obtaining a solution describing the dark matter tail in the Milky Way Galaxy. That is, the dark matter in the M
Externí odkaz:
https://doaj.org/article/41790609410f43139e31e291d30e55fe
Publikováno v:
Physical Sciences Forum, Vol 7, Iss 1, p 8 (2023)
Dark matter in the Milky Way is explained by the F-type of vacuum polarization, which could represent dark radiation. A nonsingular solution for dark radiation exists in the presence of eicheon (i.e., black hole in old terminology) in the galaxy’s
Externí odkaz:
https://doaj.org/article/36367c4c30e84dd594a99a75ae75da05
Publikováno v:
Universe, Vol 8, Iss 9, p 456 (2022)
We considered a vacuum polarization inside a galaxy in the eikonal approximation and found that two possible types of polarization exist. The first type is described by the equation of state p=ρ/3, similar to radiation. Using the conformally unimodu
Externí odkaz:
https://doaj.org/article/bc5ef7f850a148219ef564fe7fa52f3b
The Grassmann variables are used to transform a system with constraints into an unconstraint system. As a result, the Schrödinger equation arises instead of the Wheeler-DeWitt one. Formally, the Schrödinger equation describes a system’s evolution
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c435446516d19f763bcbd6332413196c
https://doi.org/10.20944/preprints202304.0508.v1
https://doi.org/10.20944/preprints202304.0508.v1
Autor:
Vincent Couderc, Vladimir L. Kalashnikov, Fabio Mangini, Fabrizio Frezza, Alejandro B. Aceves, Alioune Niang, Mario Zitelli, Tigran Mansuryan, M. Ferraro, Stefan Wabnitz, Alessandro Tonello
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Scientific Reports
Archivio istituzionale della ricerca-Università di Brescia
DOAJ-Articles
Archivio della ricerca-Università di Roma La Sapienza
PubMed Central
Scientific Reports
Archivio istituzionale della ricerca-Università di Brescia
DOAJ-Articles
Archivio della ricerca-Università di Roma La Sapienza
PubMed Central
We demonstrate a new practical approach for generating multicolour spiral-shaped beams. It makes use of a standard silica optical fibre, combined with a tilted input laser beam. The resulting breaking of the fibre axial symmetry leads to the propagat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::69f0fcd514cd02ec5b109c0257b24260
https://doaj.org/article/458d46492225425c9c66532266bb268f
https://doaj.org/article/458d46492225425c9c66532266bb268f
Autor:
Alexander Rudenkov, Vladimir L. Kalashnikov, Evgeni Sorokin, Maksim Demesh, Irina T. Sorokina
Publikováno v:
Optics Express. 31:17820
The paper introduces a new route towards the ultrafast high laser peak power and energy scaling in a hybrid mid-IR chirped pulse oscillator-amplifier (CPO-CPA) system, without sacrificing neither the pulse duration nor energy. The method is based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e210f9a0218b0f5f64f60c4f6387c49
https://doi.org/10.1364/oe.484742
https://doi.org/10.1364/oe.484742
We considered a vacuum polarization around a massive object in the eikonal approximation and found two types of vacuum polarization. The first type has the equation of state similar to radiation and can produce a halo that increases the rotation velo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::882424fa64c0946ee7a560cc14e62d2e
Autor:
S. L. Cherkas, Vladimir L. Kalashnikov
Publikováno v:
Journal of the Belarusian State University. Physics. :97-111
A spherically symmetric solution for a gravitational field is considered in the conformally-unimodular metric. The reason for the study of this particular gauge (i. e., conformally-unimodular metric) is its relation to the vacuum energy problem. That
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dfe85012cbce84d8e61f17102b0fb20
https://doi.org/10.33581/2520-2243-2020-3-97-111
https://doi.org/10.33581/2520-2243-2020-3-97-111
Autor:
Vladimir L. Kalashnikov, S. L. Cherkas
Publikováno v:
Nonlinear Phenomena in Complex Systems. 23:332-337
It seems that the violation of covariance relatively general coordinate transformations exists in the real world and contributes to its fundamental structure. This guess allows omitting the main part of the vacuum energy reasonably and considering a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34bc249d7eb0a08084fdc1044dceebd2
https://doi.org/10.33581/1561-4085-2020-23-3-332-337
https://doi.org/10.33581/1561-4085-2020-23-3-332-337