Superconducting fluctuations in small grains – The Universal Hamiltonian and the reduced BCS model
✍ Scribed by Moshe Schechter
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 107 KB
- Volume
- 468
- Category
- Article
- ISSN
- 0921-4534
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📜 SIMILAR VOLUMES
A detailed treatment of the zero-temperature quantum fluctuations of a granular film, modeled by a regular lattice of Josephsoncoupled grains, is presented. For small grains, whose junction reactance is determined by virtual quasi-particle tunneling, mean field theory predicts a universal threshold
It is shown that the qualitative arguments given up to now in the literature, are not enough to justify the applications of Random Matrix Theory to the small metallic particle problem. Using a two-dimensional model we show that the spacing distributions approach Poisson's law, as originally assumed