The distribution function for the current noise in a normal-metal--superconductor quantum point contact is calculated. It is shown that this distribution describes independent processes when a charge ±{}e₀ or ±{}2e₀ passes through the contact. At low temperature and voltage only processes with double-charge transfer are relevant. At zero temperature and low voltage the distribution has a binomial form.
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Muzykantskiǐ et al. (1994) studied this question.
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