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Are there plasminos in superconductors?

Barbara Betz, Dirk H. Rischke

nucl-tharXiv:nucl-th/0609019

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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