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 quasiparticle 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.
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|Titolo:||Charge and current fluctuations in a superconducting single-electron transistor near a Cooper pair resonance|
|Data di pubblicazione:||2003|
|Citazione:||Charge and current fluctuations in a superconducting single-electron transistor near a Cooper pair resonance / CHOI M., S; Plastina, Francesco; Fazio, R.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 67(2003), pp. 045105-1-045105-11.|
|Appare nelle tipologie:||1.1 Articolo in rivista|