DISPERSION RELATIONS IN ULTRADEGENERATE RELATIVISTIC PLASMAS
DISPERSION RELATIONS IN ULTRADEGENERATE RELATIVISTIC PLASMAS
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DOI：
10.1103/physrevd.62.076009
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发表时间：
2000-05
影响因子：
5
通讯作者：
C. Manuel
中科院分区：
文献类型：
--
作者：
C. Manuel
激发模在相对论超简并等离子体中的传播受其与介质的相互作用的影响。这些modications可以计算通过评估他们的壳层自能，这给出（gaugestependent）色散关系。对于动量接近费米动量的模式，单圈费米子自能由圈中有软光子的图所支配。本文研究了准粒子和反准粒子的单圈色散关系，当它们与费米海的电子散射时，由于它们的相空间限制非常不同，它们的行为是不同的。在相对论系统中，未屏蔽的磁相互作用破坏了等离子体的正常费米液体行为。对于小的费米速度值，我们恢复凝聚态系统的非相对论色散关系。
The propagation of excitation modes in a relativistic ultradegenerate plasma is modied by their interactions with the medium. These modications can be computed by evaluating their on-shell self-energy, which gives (gaugeindependent) dispersion relations. For modes with momentum close to the Fermi momentum, the one-loop fermion self-energy is dominated by a diagram with a soft photon in the loop. We nd the one-loop dispersion relations for quasiparticles and antiquasiparticles, which behave dierently as a consequence of their very dierent phase-space restrictions when they scatter with the electrons of the Fermi sea. In a relativistic system, the unscreened magnetic interactions spoil the normal Fermi liquid behavior of the plasma. For small values of the Fermi velocity, we recover the non-relativistic dispersion relations of condensed matter systems.