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Are there plasminos in superconductors?

Barbara Betz, Dirk H. Rischke

DOI 10.1103/PhysRevD.75.065022 · Physical Review D

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Abstract

Hot and/or dense, normal-conducting systems of relativistic fermions exhibit a particular collective excitation, the so-called plasmino. We compute the one-loop self-energy, the dispersion relation, and the spectral density for fermions interacting via attractive boson exchange. It is shown that plasminos also exist in superconductors.

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