Ba. Muzykantskii et De. Khmelnitskii, QUANTUM SHOT-NOISE IN A NORMAL-METAL SUPERCONDUCTOR POINT-CONTACT, Physical review. B, Condensed matter, 50(6), 1994, pp. 3982-3987
The distribution function for the current noise in a normal-metal-supe
rconductor 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 p
rocesses with double-charge transfer are relevant. At zero temperature
and low voltage the distribution has a binomial form.