Electron-Photon Cascade Process in Intergalactic Space

Electron transport process in quantum cascade intersubband semiconductor lasers

Detailed self-consistent calculations have been performed of the electron transport and capture aspects of the dynamics of electrically pumped quantum cascade intersubband semiconductor lasers. Specific attention is given to the dependence of the characteristic carrier relaxation times on carrier temperature and density at different applied biases. We have found that the capture and intersubban...

Superconducting cascade electron refrigerator

Sparticle Production in Electron - Photon

We explore the potential of electron-photon colliders to measure fundamental supersymmetry parameters via the processes ee ! ~ e~ 0 (selectron-neutralino) and ee ! ~ ~ ? (sneutrino-chargino). Given the ~ 0 and ~ ? masses from e + e ? and hadron collider studies, cross section ratios (?)==(+) for opposite photon helicities determine the ~ L , ~ e L and ~ e R masses, independent of the sparticle ...

Magnetic field in galaxies, galaxy clusters, and intergalactic space

1550-7998=20 Magnetic fields of unknown origin appear to permeate the Universe on all large scales. We suggest that the winds and cosmic rays, which are produced by the spherical ejecta and jets from supernova explosions, magnetize the interstellar medium in galaxies, the intracluster medium in galaxy clusters, and the intergalactic space. We show that, if the cosmic rays generate magnetic fiel...

Photon and electron spins.

It is easy to draw an intuitive parallel between the classical free electromagnetic field and its corresponding quantum, the photon-a spin-1 object. The situation with a massive particle such as an electron is less clear, as a real-world analog of the classical field whose quantum is the massive particle is not available. It is concluded that the fermion particle perspective provides the best a...