Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2002-08-16
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 11 figures
Scientific paper
10.1103/PhysRevB.67.045105
We analyze charge tunneling statistics and current noise in a superconducting single-electron transistor in a regime where the Josephson-quasiparticle cycle is the dominant mechanism of transport. Due to the interplay between Coulomb blockade and Josephson coherence, the probability distribution for tunneling events strongly deviates from a Poissonian and displays a pronounced even--odd asymmetry in the number of transmitted charges. The interplay between charging and coherence is reflected also in the zero-frequency current noise which is significantly quenched when the quasi-particle tunneling rates are comparable to the coherent Cooper-pair oscillation frequency. Furthermore the finite frequency spectrum shows a strong enhancement near the resonant transition frequency for Josephson tunneling.
Choi Mahn-Soo
Fazio Rosario
Plastina Francesco
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