Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-03-23
Phys.Rev.D83:111501,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, 3 figures; references on the zero sound added and typos corrected
Scientific paper
10.1103/PhysRevD.83.111501
We explicitly construct the fermion propagator in a magnetic field background B to take the lowest Landau-level approximation. We analyze the energy and momentum dependence in the polarization tensor and discuss the collective excitations. We find there appear two branches of collective modes in one of two transverse gauge particles; one represents a massive and attenuated gauge particle and the other behaves similar to the zero sound at finite density.
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