Výsledky vyhledávání - "G. V. Efimov"

Autor: G. V. Efimov

Publikováno v: Theoretical and Mathematical Physics. 185:1433-1444

We describe the behavior of a quantum particle in a random medium using the Green’s function in the functional integral representation and propose methods for evaluating it. We calculate the localization length in the case of motion in a disordered

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aa71001cc72ce86600267f07cde0625f
https://doi.org/10.1007/s11232-015-0352-5

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Akademický článek

On the Ladder Bethe-Salpeter Equation.

Autor: G. V. Efimov¹

Publikováno v: Few-Body Systems. Dec2003, Vol. 33 Issue 4, p199-217. 19p.

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Bound States in the Quantum Scalar Electrodynamics

Autor: G. V. Efimov

Publikováno v: Few-Body Systems. 47:137-155

The next relativistic correction to α to for bound state mass of two charged scalar particles is calculated in the quantum scalar electrodynamics by the functional integral method. Contribution of the “nonphysical” time variable turned out to be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::573e8d81a3e5a82ca9483aea49322fe2
https://doi.org/10.1007/s00601-010-0083-y

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The Bethe-Salpeter equation with fermions

Autor: G. V. Efimov

Publikováno v: Few-Body Systems. 41:157-184

The Bethe-Salpeter (BS) equation in the ladder approximation is studied within a fermion theory: two fermion fields (constituents) with mass m interacting via an exchange of a scalar field with mass μ. The BS equation can be written in the form of a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2e1d7074e8c6ee7d10ddae59b343fafd
https://doi.org/10.1007/s00601-007-0180-8

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Calculating field theories beyond the mean-field level

Autor: Stephan A. Baeurle, E. A. Nogovitsin, G. V. Efimov

Publikováno v: Europhysics Letters (EPL). 75:378-384

Mean-field theories are widely used as comparative theoretical tools throughout all areas of natural and engineering sciences. They are capable in many instances to deliver useful insights in properties and behavior of multi-body systems at relativel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fcc2344931378c10b28c7ecd90b40f76
https://doi.org/10.1209/epl/i2006-10133-6

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Solution of the radiative transfer equation in the separable approximation

Autor: G. V. Efimov, Nikolai V. Kryzhevoi, R. Wehrse, W. von Waldenfels

Publikováno v: Journal of Quantitative Spectroscopy and Radiative Transfer. 94:291-309

A method for the fast and accurate solution of the radiative transfer equation in plane-parallel media with coherent isotropic scattering is presented. This largely analytical approach uses the formalism of meromorphic functions in order to obtain th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ce1d30864e78bf2945c5531b23fa499
https://doi.org/10.1016/j.jqsrt.2004.09.013

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Stability of Quantum Electrodynamics and Quantum Chromodynamics

Autor: G. V. Efimov

Publikováno v: Theoretical and Mathematical Physics. 141:1398-1414

We consider the vacuum energy in QED viewed as in a system of charged fermions and bosons and in QCD viewed as in a system of quarks (fermions) and gluons (bosons) in a self-dual field with a constant strength. We show that the cause of instability i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5379e12cee9b6afa409c1b7056d0beaf
https://doi.org/10.1023/b:tamp.0000043856.41940.3c

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STRONG-COUPLING REGIME IN $g\phi^4_2$ THEORY

Autor: G. Ganbold, G. V. Efimov

Publikováno v: International Journal of Modern Physics A. 18:1637-1656

The problem of the strong-coupling regime is considered in the scalar superrenormalizable field theory [Formula: see text]. By using the Gaussian transform, we have found an optimal representation within which the exact strong-coupling behavior of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3182fd29b7b136bd84a4c960a7c5f7ac
https://doi.org/10.1142/s0217751x03013727

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Problems of balancing and perspectives of armament system development of the Army of the Ukrainian Armed Forces

Autor: G. V. Efimov, M. M. Seredenko

Publikováno v: Military Technical Collection; № 11 (2014); 46-51
Военно-технический сборник; № 11 (2014); 46-51
Військово-технічний збірник; № 11 (2014); 46-51

Problems of balancing and perspectives of armament system development of the Army of the Ukrainian Armed forces.The article analyses the state of development of armament and military equipment in the armed forces of the leading countries and Ukraine,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e54a1a64ed5a8a8bd62968d6081fec2f
http://vtz.asv.gov.ua/article/view/157042

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Analytical solution of the radiative transfer equation in the two-stream approximation

Autor: Nikolai V. Kryzhevoi, G. V. Efimov, Rainer Wehrse

Publikováno v: Astronomy & Astrophysics. 370:707-714

The analytical solution of the plane-parallel radiative transfer equation is obtained in the two-stream approximation for a large class of continuous distributions of the de-excitation coecient " (constant, linear, parabolic, with spikes etc.). We pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::13e8ade14d19baa29121cb5cc498950a
https://doi.org/10.1051/0004-6361:20010310

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