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Two interacting quasiparticles above the Fermi sea

Ph. Jacquod·D. L. Shepelyansky
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Abstract

We study numerically the interaction and disorder effects for two quasiparticles in two and three dimensions. The dependence of the interaction-induced Breit-Wigner width on the excitation energy above the Fermi level, the disorder strength and the system size is determined. A regime is found where the width is practically independent of the excitation energy. The results allow to estimate the two quasiparticle mobility edge.

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Ph. Jacquod, D. L. Shepelyansky. 1996-11-29. Two interacting quasiparticles above the Fermi sea. https://doi.org/10.1103/physrevlett.78.4986

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