Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 65: Quantum information: Quantum computers and communication II

Q 65.6: Vortrag

Freitag, 21. März 2014, 15:15–15:30, DO26 207

Teleportation of flying qubits emitted from semiconductor quantum dots — •Thomas Kreissl, Tim Kroh, Otto Dietz, and Oliver Benson — AG Nanooptik, Humboldt-Universität zu Berlin

The distribution of quantum states over long distances is essential for quantum cryptography. Todays fibers restrict quantum communication to distances of about 100 km. Only quantum repeaters allow quantum key distribution over much longer distances by swapping the entanglement of spatially distant photon pairs.

We set up a two-color, folded-sandwich [1], parametric down conversion source to create entangled photon pairs. With these photon pairs we want to demonstrate the coalescence [2] and teleportation of flying qubits emitted from semiconductor quantum dots.

[1] Steinlechner F, et al., Optics Express 2013, 21, 11943

[2] Polyakov SV, et al., Phys Rev Lett. 2011, 107, 157402