Shot noise for resonant Cooper pair tunneling.
We study intrinsic noise of current in a superconducting single-electron transistor, taking into account both coherence effects and Coulomb interaction near a Cooper pair resonance. Because of this interplay, the statistics of tunneling events deviates from the Poisson distribution and, more important, it shows even-odd asymmetry in the transmitted charge. The zero-frequency noise is suppressed significantly when the quasiparticle tunneling rates are comparable to the coherent oscillation frequency of Cooper pairs.
Choi
M S
MS
Department of Physics and Astronomy, University of Basel, Klingelberstrasse 82, 4056 Basel, Switzerland.
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