Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Shabad, Anatoly E."'
The overcritical regime of axion-electrodynamics (AED) is investigated. For magnetic fields larger than the characteristic scale linked to AED, quantum vacuum fluctuations due to axion-like fields can dominate over those associated with the electron-
Externí odkaz:
http://arxiv.org/abs/2203.14851
In a constant and homogeneous magnetic background, quantum vacuum fluctuations due to axion-like fields can dominate over those associated with the electron-positron fields. Considering the framework of axion-electrodynamics, the self-energy operator
Externí odkaz:
http://arxiv.org/abs/1807.04632
Autor:
Shabad, Anatoly E.
Publikováno v:
Teor. Mat. Fiz. 187(3) 421 (2016) Russian; Theor. Math. Phys. 187(3): 813-822(2016)
In theories, whose Lorentz invariance is violated by involvement of an external any-rank tensor, we show that the standard relativistic rule still holds true for summing the signal speed, understood as the group velocity of a wave, with the speed of
Externí odkaz:
http://arxiv.org/abs/1511.08785
Publikováno v:
Phys. Rev. D 92, 041702 (2015)
In nonlinear electrodynamics, QED included, we find a static solution to the field equations with an electric charge as its source, which is comprised of homogeneous parallel magnetic and electric fields, and a radial spherically-nonsymmetric long-ra
Externí odkaz:
http://arxiv.org/abs/1507.02327
We consider a simple nonlinear (quartic in the fields) gauge-invariant modification of classical electrodynamics, which possesses a regularizing ability sufficient to make the field energy of a point charge finite. The model is exactly solved in the
Externí odkaz:
http://arxiv.org/abs/1312.0447
Publikováno v:
Phys. Rev. D 88, 085026 (2013)
We find third-power nonlinear corrections to the Coulomb and other static electric fields, as well as to the electric and magnetic dipole fields, as we work within QED with no background field. The nonlinear response function we base our consideratio
Externí odkaz:
http://arxiv.org/abs/1307.1802
Autor:
Gitman, Dmitry M., Shabad, Anatoly E.
Publikováno v:
PhysRevD.86.125028 (2012)
We find first nonlinear correction to the field, produced by a static charge at rest in a background constant magnetic field. It is quadratic in the charge and purely magnetic. The third-rank polarization tensor - the nonlinear response function - is
Externí odkaz:
http://arxiv.org/abs/1209.6287
Publikováno v:
Phys.Rev.D86(2012)105040
Nonlinear electrodynamics, QED included, is considered against the Lorentz-noninvariant external field background, treated as an anisotropic medium. Hamiltonian formalism is applied to electromagnetic excitations over the background, and entities of
Externí odkaz:
http://arxiv.org/abs/1206.4491
Autor:
Shabad, Anatoly E., Usov, Vladimir V.
In a strong magnetic field, B > 4x10^{12} G, gamma-rays emitted nearly along curved field lines adiabatically convert into bound electron-positron pairs (positronium atoms) rather that decaying into free pairs. This process may modify the polar gaps
Externí odkaz:
http://arxiv.org/abs/1109.5611
Autor:
Shabad, Anatoly E., Usov, Vladimir V.
Publikováno v:
Phys.Rev.D83:105006,2011
In nonlinear electrodynamics, by implementing the causality principle as the requirement that the group velocity of elementary excitations over a background field should not exceed the speed of light in the vacuum and the unitarity principle as the r
Externí odkaz:
http://arxiv.org/abs/1101.2343