The correlations of the electrons field-emitted from a superconductor are fully analyzed, both in space and time. It is proposed that a coincidence experiment would reveal a positive correlation between the electrons emitted in opposite directions. The electrons can be entangled and can even violate Bell's inequality. The crucial role played by Andreev's process is scrutinized, analytical formulas are derived for the correlations, and the physics behind the phenomenon is clarified.
|Physical Review B - Condensed Matter and Materials Physics
|Published - 2009 Sept 29
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics