Full counting statistics of incoherent Andreev transport
Departement Physik und Astronomie, Universität Basel
Klingelbergstrasse 82, CH-4056 Basel, Switzerland
2 Département de Physique Théorique, Université de Genève CH-1211 Genève 4, Switzerland
Accepted: 28 July 2003
We study the full counting statistics of heterostructures consisting of normal-metal parts connected to a superconducting terminal. Assuming that coherent superconducting correlations are suppressed in the normal metals, we show, using the Keldysh-Nambu Green's function approach, that the system can be mapped onto a purely normal system with twice the number of elements. For a superconducting beamsplitter with several normal terminals we obtain general results for the counting statistics.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 72.70.+m – Noise processes and phenomena / 73.23.-b – Electronic transport in mesoscopic systems
© EDP Sciences, 2003