Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 17: Quantum Repeater and Quantum Communication

Q 17.6: Talk

Tuesday, March 7, 2017, 12:15–12:30, P 3

Conversion of polarization to time-bin entanglement for applications in quantum networks — •Chris Müller, Tim Kroh, Andreas Ahlrichs, and Oliver Benson — AG Nanooptik, Institut für Physik, Humboldt-Universität zu Berlin

A key requirement for the acceptance of quantum communication as new technology is its compatibility with existing classical fiber networks. Such a quantum network should also contain quantum repeaters [1], which can be realized using entangled photon pair sources. However, many of the entangled photon sources rely on polarization entanglement, which is challenging to maintain over long-distance fiber networks.

Entanglement in time and position [2] is a suitable candidate for overcoming the loss of polarization entanglement in fibers. We set up a converter which allows for transfer of entanglement from polarization to time and position. In this presentation we want to demonstrate the preliminary results of such a conversion with the goal of using optical fibers for building a quantum network [3].

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