A Mesoscopic Resonating Valence Bond system on a triple dot
Mesoscale and Nanoscale Physics
2009-11-11 v2 Superconductivity
Abstract
We introduce a mesoscopic pendulum from a triple dot. The pendulum is fastened through a singly-occupied dot (spin qubit). Two other strongly capacitively islands form a double-dot charge qubit with one electron in excess oscillating between the two low-energy charge states (1,0) and (0,1); this embodies the weight of the pendulum. The triple dot is placed between two superconducting leads as shown in Fig. 1. Under well-defined conditions, the main proximity effect stems from the injection of resonating singlet (valence) bonds on the triple dot. This gives rise to a Josephson current that is charge- and spin-dependent. Consequences in a SQUID-geometry are carefully investigated.
Cite
@article{arxiv.cond-mat/0510450,
title = {A Mesoscopic Resonating Valence Bond system on a triple dot},
author = {Karyn Le Hur and Patrik Recher and Emilie Dupont and Daniel Loss},
journal= {arXiv preprint arXiv:cond-mat/0510450},
year = {2009}
}
Comments
final version to appear in PRL