Dynamical Coulomb Blockade and Spin-Entangled Electrons
Abstract
We consider the creation of mobile and nonlocal spin-entangled electrons from tunneling of a BCS-superconductor (SC) to two normal leads of finite resistivity. The resulting dynamical Coulomb blockade effect, which we describe phenomenologically in terms of an electromagnetic environment, is shown to be enhanced for tunneling of two electrons from a Cooper pair into the same lead compared to the desired pair-split process where each electron enters a different lead. Conversely, this latter process is suppressed by a finite separation between the tunneling points on the SC.
- Publication:
-
Physical Review Letters
- Pub Date:
- December 2003
- DOI:
- 10.1103/PhysRevLett.91.267003
- arXiv:
- arXiv:cond-mat/0307444
- Bibcode:
- 2003PhRvL..91z7003R
- Keywords:
-
- 74.45.+c;
- 03.65.Ud;
- 73.23.Hk;
- 74.50.+r;
- Proximity effects;
- Andreev effect;
- SN and SNS junctions;
- Entanglement and quantum nonlocality;
- Coulomb blockade;
- single-electron tunneling;
- Tunneling phenomena;
- point contacts weak links Josephson effects;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Superconductivity
- E-Print:
- 5 pages, 2 figures