Probing Entanglement and Non-locality of Electrons in a Double-Dot via Transport and Noise

Preprint
Publisher Website
Google Scholar
Abstract
Addressing the feasibilty of quantum communication with electrons we consider entangled spin states of electrons in a double-dot which is weakly coupled to in--and outgoing leads. We show that the entanglement of two electrons in the double-dot can be detected in mesoscopic transport and noise measurements. In the Coulomb blockade regime the singlet and triplet states lead to phase-coherent current and noise contributions of opposite signs and to Aharonov-Bohm and Berry phase oscillations in response to magnetic fields. These oscillations provide a direct measure of the associated non-locality occurring in the entangled states. We show that the ratio of noise to current (Fano factor) is universal and equal to the electron charge.

This publication has 0 references indexed in Scilit: