Crossed Andreev Re ection in Quantum Wires with Strong Spin-Orbit Interaction

Details Crossed Andreev Re ection in Quantum Wires with Strong Spin-Orbit Interaction Crossed Andreev Re ection in Quantum Wires with Strong Spin-Orbit Interaction

2011-09-28

arxiv.org/abs/1109.6357v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 2 figures

Scientific paper

We theoretically study tunneling of Cooper pairs from an s-wave superconductor into two semiconductor quantum wires with strong spin-orbit interaction under magnetic field, which approximate helical Luttinger liquids. The entanglement of electrons within a Cooper pair can be detected by the electric current cross correlations in the wires. By controlling the relative orientation of the wires, either lithographically or mechanically, on the substrate, the current correlations can be tuned, as dictated by the initial spin entanglement. This proposal of a spin-to-charge readout of quantum correlations is alternative to a recently proposed utilization of the quantum spin Hall insulator.

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