Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-11-04
Proceedings of the NATO ASI "Quantum Mesoscopic Phenomena and Mesoscopic Devices in Microelectronics", Ankara/Antalya, Turkey,
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 1 figure, Submitted to the Proceedings of the NATO ASI "Quantum Mesoscopic Phenomena and Mesoscopic Devices in Micro
Scientific paper
Studies of pairing correlations in ultrasmall metallic grains have commonly been based on a simple reduced BCS-model describing the scattering of pairs of electrons between discrete energy levels that come in time-reversed pairs. This model has an exact solution, worked out by Richardson in the context of nuclear physics in the 1960s. Here we give a tutorial introduction to his solution, and use it to check the quality of various previous treatments of this model.
Braun Fabian
Delft Jan von
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