Shot noise for resonant Cooper pair tunneling

Details Shot noise for resonant Cooper pair tunneling Shot noise for resonant Cooper pair tunneling

2001-02-20

arxiv.org/abs/cond-mat/0102341v4

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

A few minor changes; To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.87.116601

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. Due to 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.

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