Shielding of a moving test charge in a quantum plasma
arXiv:1007.0175 · doi:10.1103/PhysRevE.82.026410
Abstract
The linearized potential of a moving test charge in a one-component fully degenerate fermion plasma is studied using the Lindhard dielectric function. The motion is found to greatly enhance the Friedel oscillations behind the charge, especially for velocities larger than a half of the Fermi velocity, in which case the asymptotic behavior of their amplitude changes from 1/r^3 to 1/r^2.5. In the absence of the quantum recoil (tunneling) the potential reduces to a form similar to that in a classical Maxwellian plasma, with a difference being that the plasma oscillations behind the charge at velocities larger than the Fermi velocity are not Landau-damped.
9 pages, 11 figures. v3: Fixed typo, updated abstract
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- Dressed test particles, oscillation centres and pseudo-orbits
- Quantum kinetic theories in degenerate plasmas
- On kinetic description of electromagnetic processes in a quantum plasma
- Bound states near a moving charge in a quantum plasma