نتایج جستجو برای: relativistic bulk tensor

تعداد نتایج: 150333  

2006
A. Celotti G. Ghisellini

We study the time dependent spectra produced via the bulk Compton process by a cold, relativistic shell of plasma moving (and accelerating) along the jet of a blazar, scattering on external photons emitted by the accretion disc and reprocessed in the broad line region. Bulk Comptonization of disc photons is shown to yield a spectral component contributing in the far UV band, and would then be c...

2006
Ludovica Cotta-Ramusino David Wands

We derive the low-energy effective theory of gravity for a generalized RandallSundrum scenario, allowing for a third self-gravitating brane to live in the 5D bulk spacetime. At zero order the 5D spacetime is composed of two slices of anti-de Sitter spacetime, each with a different curvature scale, and the 5D Weyl tensor vanishes. Two boundary branes are at the fixed points of the orbifold where...

2000
Sebastian de Haro Sergey N. Solodukhin

We study gravitational aspects of Brane-World scenarios. We show that the bulk Einstein equations together with the junction condition imply that the induced metric on the brane satisfies the full non-linear Einstein equations with a specific effective stress energy tensor. This result holds for any value of the bulk cosmological constant. The analysis is done by either placing the brane close ...

Journal: :Classical and Quantum Gravity 2021

Abstract The approach of extended irreversible thermodynamics consists promoting the dissipative fluxes to non-equilibrium thermodynamic variables. In a relativistic context, this naturally leads formulation theory Israel and Stewart (1979), which is, date, one most successful theories for dissipation. Although generality principle makes it applicable any fluid, connection Israel–Stewart with m...

حسن بیگی, علی, مهدیان, حسن, گمار, پیمان,

The generation of coherent Terahertz (THz) radiation is studied which is produced from moving the relativistic electron beam through a helical wiggler with axial magnetic field. The relativistic electron beam is modulated via interacts with the beat wave of two laser beams that have frequency difference in THz range. When the modulated relativistic beam of electrons go through the helical wiggl...

2016
Xiaoming Zhang Zhipeng Hou Yue Wang Guizhou Xu Chenglong Shi EnKe Liu Xuekui Xi Wenhong Wang Guangheng Wu Xi-xiang Zhang

Spin-orbit coupling (SOC) is expected to partly determine the topologically nontrivial electronic structure of heavy half-Heusler ternary compounds. However, to date, attempts to experimentally observe either the strength of SOC or how it modifies the bulk band structure have been unsuccessful. By using bulk-sensitive nuclear magnetic resonance (NMR) spectroscopy combined with first-principles ...

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