Electron teleportation with quantum dot arrays

Details Electron teleportation with quantum dot arrays Electron teleportation with quantum dot arrays

2002-03-10

arxiv.org/abs/cond-mat/0203215v4

Eur. Phys. J. B 32, 545 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

revised version, 4 pages, 2 figures

Scientific paper

10.1140/epjb/e2003-00133-4

An electron teleportation protocol, inspired by the scenario by Bennett et al., is proposed in a mesoscopic set-up. A superconducting circuit allows to both inject and measure entangled singlet electron pairs in an array of three normal quantum dots. The selection of the teleportation process is achieved in the steady state with the help of two superconducting dots and appropriate gating. Teleportation of the electron spin is detected by measuring the spin-polarized current through the normal dot array. This current is perfectly correlated to the pair current flowing inside the superconducting circuit. The classical channel required by Bennett's protocol, which signals the completion of a teleportation cycle, is identified with the detection of an electron charge in the superconducting circuit.

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