Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 41: Quantum Information: Concepts and Methods VI

Q 41.1: Gruppenbericht

Donnerstag, 9. März 2017, 11:00–11:30, P 2

Processing of two matter qubits using cavity QED — •Stephan Welte, Bastian Hacker, Severin Daiss, Stephan Ritter, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany

In a quantum network, optical resonators provide an ideal platform for the creation of interactions between matter qubits. This is achieved by exchange of photons between the resonator-based network nodes, and in this way enables the distribution of quantum states and the generation of remote entanglement 1. Here we will show how single photons can also be used to generate local entanglement between matter qubits in the same network node 2. Such entangled states are indispensable as a resource in a plethora of quantum communication protocols. We will give an overview of the necessary experimental toolbox for an implementation with neutral atoms. Several entanglement protocols showing the generation of all the Bell states for two atoms will be presented. We will also detail how we experimentally exploit the employed method for quantum computation and quantum communication applications.
1  S. Ritter et al., Nature 484, 195 (2012)
2  A. Sørensen and K. Mølmer, Phys. Rev. Lett. 90, 127903 (2003)