https://doi.org/10.1140/epjb/e2003-00133-4
Electron teleportation with quantum dot arrays
1
Laboratoire d'Études des Propriétes
Électroniques des Solides, CNRS, BP 166, 38042 Grenoble, France
2
Centre de Physique Théorique et Université de la
Méditerranée, Case 907, 13288 Marseille, France
Corresponding author: a martin@cpt.univ-mrs.fr
Received:
10
December
2002
Revised:
14
March
2003
Published online:
7
May
2003
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 pair charge in the superconducting circuit.
PACS: 74.50.+r – Tunneling phenomena; point contacts, weak links, Josephson effects / 73.23.Hk – Coulomb blockade; single-electron tunneling / 03.65.Ud – Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003