نتایج جستجو برای: fermi plasmas
تعداد نتایج: 35381 فیلتر نتایج به سال:
The quantum version of Olbert's kappa distribution applicable to fermions is obtained. Its construction straightforward but requires recognition the differences in nature states separated by Fermi momenta. complement, bosonic also given, as procedure how construct a hypothetical kappa-anyon distribution. At very low temperature degenerate yields kappa-modified ordinary energy and momentum. We p...
Electron degeneracy effects are dominant in ultra-dense plasmas (UDP), such as those found in white dwarfs. These effects can be treated systematically by obtaining an expansion of the screening length in inverse powers of ~. The theory exhibits Thomas-Fermi-like screening in an appropriate regime. In general, our theory leads to an O(1) effect on the enhancement of fusion rates in white dwarfs...
A procedure for performing Monte Carlo calculations of plasmas with an arbitrary level of degeneracy is outlined. It has possible applications in inertial confinement fusion and astrophysics. Degenerate particles are initialised according to the Fermi–Dirac distribution function, and scattering is via a Pauli blocked binary collision approximation. The algorithm is tested against degenerate ele...
The Weibel instability in the quantum plasma case is treated by means of a fluid-like (moments) approach. Quantum modifications to the macroscopic equations are then identified as effects of first or second kind. Quantum effects of the first kind correspond to a dispersive term, similar to the Bohm potential in the quantum hydrodynamic equations for plasmas. Effects of the second kind are due t...
Collisionless shocks are pervasive in space and astrophysical plasmas and are known to be efficient particle accelerators; however, the microphysics underlying shock formation and particle acceleration is not yet fully understood. The fast progress in laser technology is bringing the study of near-relativistic collisionless shocks into the realm of laboratory plasmas. We use multi-dimensional p...
We study the effective interactions and mass action constants for pair triple associations in classical quantum plasmas. Avoiding double counting, we derive new expressions constants. The calculations resulted values that were substantially smaller than standard ones relevant temperature ranges by up to 50 percent. On this basis, determine pressure of H, He Li plasmas osmotic coefficient electr...
High-density low-temperature plasmas with degenerate species are considered in the limit of high Fermi velocities close to speed light. The small amplitude ion-acoustic solitons studied this regime. Presented analysis is based on relativistic hydrodynamic model average reverse gamma factor evolution consists equations for following functions concentration, velocity field, factor, and flux which...
Electronic properties of heavy Fermion superconductors PuCoGa5 and PuRhGa5 consisting of density of states, band structure and the Fermi surface have been calculated based on density functional theory in the local spin density approximation plus on site Coulomb correlation (LSDA+U). Calculated density of states is in overall consistency with a photo emission experiment. The bands with f charac...
We study the properties of an optically-trapped, Fermi gas of Li atoms, near the center of a broad Feshbach resonance, where strong interactions are observed. Strongly interacting Fermi gases exhibit universal behavior, and are of interest as models of exotic systems ranging from high temperature superconductors to neutron stars and quark-gluon plasmas. We measure the frequency and damping rate...
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