Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 51: Superconductivity: Tunneling, Josephson Junctions, SQUIDs
TT 51.14: Vortrag
Mittwoch, 9. März 2016, 18:45–19:00, H19
Cooper pair splitters beyond the Coulomb blockade regime — •Ehud Amitai1, Rakesh P. Tiwari1, Stefan Walter2, Thomas L. Schmidt3, and Simon E. Nigg1 — 1Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland — 2Institute for Theoretical Physics, University Erlangen Nuernberg, Staudtstrasse 7, 91058 Erlangen, Germany — 3Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg
We consider the setup of a conventional s-wave Cooper pair splitter. However, we consider the charging energies in the quantum dots to be finite and smaller than the superconducting gap. We find analytically that at low energies the superconductor mediates an inter-dot tunneling term, the spin symmetry of which is influenced by a finite Zeeman field. This effect, together with an electrical tuning scheme of the quantum dot levels, can be used to engineer a non local triplet state on the two quantum dots, thereby extending the non-local state engineering capabilities of the Cooper pair splitter system.