Zobrazeno 1 - 10
of 22
pro vyhledávání: '"O. O. Sobol"'
Publikováno v:
Low Temperature Physics. 48:1022-1032
Two approaches are developed for the study of the bound states of a one-dimensional Dirac equation with the potential consisting of N δ-function centers. One of these uses Green’s function method. This method is applicable to a finite number N of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdc51a3d188ed8f0137b7f228d6136cf
https://doi.org/10.1063/10.0015111
https://doi.org/10.1063/10.0015111
In the framework of Higgs inflation, we consider the electromagnetic field nonminimally coupled to gravity via the parity-preserving $\propto RF^{2}$ and parity-violating $\propto RF\tilde{F}$ terms. Using the perturbation theory to the leading order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::960dcc8d534efb4b642f541835764152
http://arxiv.org/abs/2104.14400
http://arxiv.org/abs/2104.14400
Publikováno v:
Physical Review
We study the explosive production of gauge fields during axion inflation in a novel gradient expansion formalism that describes the time evolution of a set of bilinear electromagnetic functions in position space. Based on this formalism, we are able
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::28a9e8cca305662ebf4d959400436d2c
In order to describe magnetogenesis during inflation in the kinetic coupling model, we utilize a gradient expansion which is based on the fact that only long-wavelength (superhorizon) modes undergo amplification. For this purpose, we introduce a set
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc74be8cb5f8671e6f732cbe28b2dc67
http://arxiv.org/abs/2010.13587
http://arxiv.org/abs/2010.13587
Publikováno v:
Physical Review Letters
Physical Review Letters, 126(2). American Physical Society (APS)
Boyarsky, A, Cheianov, V V, Ruchayskiy, O & Sobol, O 2021, ' Evolution of the Primordial Axial Charge across Cosmic Times ', Physical Review Letters, vol. 126, no. 2, 021801 . https://doi.org/10.1103/PhysRevLett.126.021801
Physical Review Letters, 126(2). American Physical Society (APS)
Boyarsky, A, Cheianov, V V, Ruchayskiy, O & Sobol, O 2021, ' Evolution of the Primordial Axial Charge across Cosmic Times ', Physical Review Letters, vol. 126, no. 2, 021801 . https://doi.org/10.1103/PhysRevLett.126.021801
We investigate collisional decay of the axial charge in an electron-photon plasma at temperatures 10 MeV - 100 GeV. We demonstrate that the decay rate of the axial charge is first order in the fine-structure constant $\Gamma_{\rm flip}\propto \alpha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9dcffad103e58d736ba6897c31d9eca9
By using the first-principles approach, we derive a system of three quantum kinetic equations governing the production and evolution of charged scalar particles by an electric field in an expanding universe. Analyzing the ultraviolet asymptotic behav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffc356b1c0c7b19448cc57da1044f664
Publikováno v:
Physical Review D
Using the kinetic approach, we study the impact of the charged particles dynamics due to the Schwinger effect on the electric field evolution during inflation. As a simple model of the electric field generation, we consider the kinetic coupling of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::021ed2c47fff9bce62e8207e6a20f506
http://arxiv.org/abs/1909.10332
http://arxiv.org/abs/1909.10332
Autor:
O. O. Sobol
Publikováno v:
Physical Review D
Physical Review
Physical Review
We study the electrical conductivity of hot Abelian plasma containing scalar charge carriers in the leading logarithmic order in coupling constant $\alpha$ using the Boltzmann kinetic equation. The leading contribution to the collision integral is du
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbfe0b31ac5726d119714203b0e597fb
Publikováno v:
Physical Review
Physical Review D
Physical Review. D, Vol. 98, No 6 (2018)
Physical Review D
Physical Review. D, Vol. 98, No 6 (2018)
We study the generation of electromagnetic fields during inflation when the conformal invariance of Maxwell's action is broken by the kinetic coupling $f^{2}(\phi)F_{\mu\nu}F^{\mu\nu}$ of the electromagnetic field to the inflaton field $\phi$. We con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33bde807a397de2936da79a70e2c92f6
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Electron states in the field of charged impurities in two-dimensional Dirac systems (Review Article)
Publikováno v:
Low Temperature Physics
Scopus-Elsevier
Scopus-Elsevier
We review the theoretical and experimental results connected with the electron states in two-dimensional Dirac systems paying a special attention to the atomic collapse in graphene. Two-electron bound states of a Coulomb impurity are considered too.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb5ff6dcdbf0c2e7b3d546fdcf61e954