Electronic Hong-Ou-Mandel interferometer for multi-mode entanglement detection

Giovannetti, Vittorio; Frustaglia, Diego; Taddei, Fabio; Fazio, Rosario

Electronic Hong-Ou-Mandel interferometer for multi-mode entanglement detection

Authors

Giovannetti, Vittorio

Frustaglia, Diego

Taddei, Fabio

Fazio, Rosario

Description

We show that multi-mode entanglement of electrons in a mesoscopic conductor can be detected by a measurement of the zero-frequency current correlations in an electronic Hong-Ou-Mandel interferometer. By this mean, one can further establish a lower bound to the entanglement of formation of two-electron input states. Our results extend the work of Burkard and Loss [Phys. Rev. Lett. 91, 087903 (2003)] to many channels and provide a way to test the existence of entangled states involving both orbital and spin degrees of freedom.
6 pages. Revised version. Ref. added