نتایج جستجو برای: polarization fields

تعداد نتایج: 306559  

2006
Davide Lazzati

Synchrotron is considered the dominant emission mechanism in the production of gamma-ray burst photons in the prompt as well as in the afterglow phase. Polarization is a characteristic feature of synchrotron and its study can give a wealth of information on the properties of the magnetic field and of the energy distribution in gamma-ray burst jets. In this paper I will review the theory and obs...

1999
Jeremy S. Heyl Nir J. Shaviv

Extremely strong magnetic fields change the vacuum index of refraction. Although this polarization-dependent effect is small for typical neutron stars, it is large enough to decouple the polarization states of photons travelling within the field. The photon states evolve adiabatically and follow the changing magnetic field direction. The combination of a rotating magnetosphere and a frequency-d...

2013
John F. C. Wardle

In the literature there is now a wealth of images of AGN in both linear and circular polarization at milliarcsecond resolution of many sources at multiple epochs and wavelengths. This review is a broad overview of our current state of knowledge of the polarization properties of AGN jets, and of what we can infer about the structure of their magnetic fields and the distribution of Faraday rotati...

1995
Vadim Zeitlin

A low-temperature expansion of QED one-loop effective Lagrangian valid for a wide range of parameters is presented in a form of finite sums of elementary functions. Starting from the effective action components of the one-loop polarization operator responsible for Hall conductivity and Debye screening are obtained. It is shown that in a strong background magnetic field the Debye radius depends ...

2000
Y. Fukui

We summarize the methods used for simulation of polarization effects in the front end of a possible neutrino factory. We first discuss the helicity of muons in the pion decay process. We find that, neglecting acceptance considerations, the average helicity asymptotically approaches a magnitude of 0.185 at large pion momenta. Next we describe the methods used for tracking the spin through the co...

2004
Yoshio Kami Fengchao Xiao Kimitoshi Murano Majid Tayarani

Authors have proposed a new immunity/susceptibility test method. The paper describes an overview of the proposed method and some estimation results. In the method, electromagnetic fields of low-rate-rotating polarization controlled electrically and continuously in a two-dimensional plane, so that radiated immunity/susceptibility characteristics depicted threedimensionally can be obtained by usi...

Journal: :Physical review letters 2007
Hans-Andreas Engel Emmanuel I Rashba Bertrand I Halperin

We show that the joint effect of spin-orbit and magnetic fields leads to a spin polarization perpendicular to the plane of a homogeneous two-dimensional electron system with Rashba spin-orbit coupling and in-plane parallel dc magnetic and electric fields, for angle-dependent impurity scattering or nonparabolic energy spectrum, while only in-plane polarization persists for simplified models. We ...

2005
H. Wen Walter Greiner

1 Institute of High Energy Physics, Chinese Academy of Sciences, P.O.Box 918(4), Beijing 100049, China∗ 2 Graduate School of the Chinese Academy of Sciences, Beijing 100049, China 3 Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, U.S.A. 4 Frankfurt Institute for Advanced Studies,J.W. Goethe-Universität, Max-von-Laue Strasse 1, 60438 Frankfurt am Main, Germany ...

2005
J. H. VAN VLECK

mentum effects. It may be that we shall be dtiven to assume that the electron here functions as a dipole (magnetic), evidence for which has already been given by Compton, and that when moving in different directions in the non-isotropic force field of a crystal it assumes different orientations. 1 W. Voigt, Lehrbuch der Krystallphysik, Teubner, Leipzig, 1910, p. 369. 2 W. Thomson, Edin. Proc., ...

2008
Massimo Giovannini Kerstin E. Kunze

The complete calculation of the CMB polarization observables (i.e. Eand B-modes) is reported within the conventional ΛCDM paradigm supplemented by a stochastic magnetic field. Intriguing perspectives for present and forthcoming CMB polarization experiments are outlined. Large-scale magnetism recently became an intriguing triple point where cosmology, astronomy and high-energy astrophysics meet ...

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