Unitary limit in crossed Andreev transport
Abstract
One of the most promising approaches for generating spin- and energy-entangled electron pairs is splitting a Cooper pair into the metal through spatially separated terminals. Utilizing hybrid systems with the energy-dependent barriers at the superconductor/normal metal (NS) interfaces, one can achieve a practically 100% efficiency outcome of entangled electrons. We investigate a minimalistic one-dimensional model comprising a superconductor and two metallic leads and derive an expression for an electron-to-hole transmission probability as a measure of splitting efficiency. We find the conditions for achieving 100% efficiency and present analytical results for the differential conductance and differential noise.
- Publication:
-
New Journal of Physics
- Pub Date:
- October 2015
- DOI:
- 10.1088/1367-2630/17/10/103016
- arXiv:
- arXiv:1412.8145
- Bibcode:
- 2015NJPh...17j3016S
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Superconductivity;
- Quantum Physics
- E-Print:
- 8 pages, 6 figures