Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 6: Quantum Information (Concepts and Methods) I
Q 6.1: Gruppenbericht
Montag, 5. März 2018, 10:30–11:00, K 1.019
Quantum teleportation via electron-exchange collisions — •Bernd Lohmann1,2, Karl Blum2, and Burkhard Langer3 — 1The Hamburg Centre For Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2Institut für Theoretische Physik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 9, 48149 Münster, Germany — 3Physikalische Chemie, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
In recent research [1,2], we have shown that strong correlations exist in elastic electron-exchange collisions of light hydrogen-like atoms, violating Bell’s inequalities significantly, which allows for generating tunable spin pairs with any desired degree of entanglement. Utilizing our tunable entanglement resource, we will discuss the possibility of performing quantum teleportation with free massive particles applying a twofold elastic electron-exchange scattering. In a first collision, an unpolarized electron will be scattered on an unpolarized atom, generating an entangled electron–atom pair. Subsequently, in a second scattering, an arbitrarily polarized electron will collide with the entangled atom thereby generating interference which allows for teleporting the degree of spin polarization onto the former unpolarized electron. We will demonstrate the feasibility of such experiments.
[1] Blum K., and Lohmann, B., Phys. Rev. Lett. 116, 033201 (2016).
[2] Lohmann, B., Blum, K., and Langer, B., Phys. Rev. A 94, 032331 (2016).