Two-electron transport in a quantum waveguide having a single Anderson impurity

Jung-Tsung Shen, Shanhui Fan
2009 New Journal of Physics  
The strongly correlated two-electron transport in one-dimensional channel coupled with an Anderson-type impurity is solved exactly via a Bethe ansatz approach. We show that the transport properties are fundamentally different for spin singlet and triplet states, thus the impurity acts as a novel filter that operates based on the total spin angular momentum of the electron pairs, but not individual spins. The filter provides a deterministic generation of electron entanglement in spin, as well as energy and momentum space.
doi:10.1088/1367-2630/11/11/113024 fatcat:gdzw2pv7cvef7ica55a6tftdc4