Josephson and Andreev transport through quantum dots

Details Josephson and Andreev transport through quantum dots Josephson and Andreev transport through quantum dots

2011-11-21

arxiv.org/abs/1111.4939v1

Adv. Phys. 60, 899 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

39 pages, 54 figures, corresponds to a review article as submitted to Advances in Physics

Scientific paper

10.1080/00018732.2011.624266

In this article we review the state of the art on the transport properties of quantum dot systems connected to superconducting and normal electrodes. The review is mainly focused on the theoretical achievements although a summary of the most relevant experimental results is also given. A large part of the discussion is devoted to the single level Anderson type models generalized to include superconductivity in the leads, which already contains most of the interesting physical phenomena. Particular attention is paid to the competition between pairing and Kondo correlations, the emergence of \pi-junction behavior, the interplay of Andreev and resonant tunneling, and the important role of Andreev bound states which characterized the spectral properties of most of these systems. We give technical details on the several different analytical and numerical methods which have been developed for describing these properties. We further discuss the recent theoretical efforts devoted to extend this analysis to more complex situations like multidot, multilevel or multiterminal configurations in which novel phenomena is expected to emerge. These include control of the localized spin states by a Josephson current and also the possibility of creating entangled electron pairs by means of non-local Andreev processes.

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