Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Jens Zamanian"'
Strong field physics close to or above the Schwinger limit are typically studied with vacuum as initial condition or by considering test particle dynamics. However, with a plasma present initially, quantum relativistic mechanisms such as Schwinger pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::571b80f149dfca4d363f8dada985c0b1
http://arxiv.org/abs/2209.07872
http://arxiv.org/abs/2209.07872
Autor:
Gert Brodin, Jens Zamanian
As is well-known, for plasmas of high density and modest temperature, the classical kinetic theory needs to be extended. Such extensions can be based on the Schr\"odinger Hamiltonian, applying a Wigner transform of the density matrix, in which case t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e057212ad71fc6fbf3a12aea61060a83
http://arxiv.org/abs/2111.00994
http://arxiv.org/abs/2111.00994
Publikováno v:
The European Physical Journal D. 75
We present a quantum kinetic theory for spin-$1/2$ particles, including the spin-orbit interaction, retaining particle dispersive effects to all orders in $\hbar$, based on a gauge-invariant Wigner transformation. Compared to previous works, the spin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::805d234f0c3d43078d6c96a85390bcee
https://doi.org/10.1140/epjd/s10053-020-00021-3
https://doi.org/10.1140/epjd/s10053-020-00021-3
We derive a system of coupled partial differential equations for the equal-time Wigner function in an arbitrary strong electromagnetic field using the Dirac-Heisenberg-Wigner formalism. In the electrostatic limit, we present a system of four coupled
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1288d3184b7a37c4c47a96c376a25dbb
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-186411
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-186411
When the Zeeman energy approaches the characteristic kinetic energy of electrons, Landau quantization becomes important. In the vicinity of magnetars, the Zeeman energy can even be relativistic. We start from the Dirac equation and derive a kinetic e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d40ecafcadfd86287003d3d6fa1c92a
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176304
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-176304
Publikováno v:
Physical Review E. 100
We study a recently derived fully relativistic kinetic model for spin-1/2 particles. Firstly, the full set of conservation laws for energy, momentum and angular momentum are given, together with an expression for the (non-symmetric) stress-energy ten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c64ebde297b6b095393665e029e984a6
https://doi.org/10.1103/physreve.100.023201
https://doi.org/10.1103/physreve.100.023201
In this review we give an overview of recent work on quantum kinetic theories of plasmas. We focus, in particular, on the case where the electrons are fully degenerate. For such systems, perturbation methods using the distribution function can be pro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4feba65438b0f90cd55c5249fa54d0b2
In this paper we derive a fully relativistic kinetic theory for spin-1/2 particles and its coupling to Maxwell's equations, valid in the long scale-length limit, where the fields vary on a scale much longer than the localization of the particles; we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99809a51772f12d14fef8ef9f4e6b4d2
Publikováno v:
Journal of Plasma Physics. 80:643-652
The theory for nonlinear three-wave interaction in magnetized plasmas is reconsidered using quantum hydrodynamics. The general coupling coefficients are calculated for a generalized Bohm de Broglie term. It is found that the Manley-Rowe relations are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15e399eacccace6f1d40e521f345d0d7
https://doi.org/10.1017/s0022377814000075
https://doi.org/10.1017/s0022377814000075
Publikováno v:
Physics of Plasmas. 26:092113
We have extended previous quantum kinetic results to compute the exchange correction to the electrostatic electron susceptibility for arbitrary frequencies and wavenumbers in the low temperature li ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fd44687637c872b818c4d738e7091ab
https://doi.org/10.1063/1.5104339
https://doi.org/10.1063/1.5104339