Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 69: Quantum Information: Quantum Computing and Communication IV

Q 69.2: Vortrag

Freitag, 4. März 2016, 14:45–15:00, e214

A two-photon quantum gate — •Bastian Hacker, Stephan Welte, Stephan Ritter, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching

Optical photons are excellent carriers of quantum information with well established technologies for their creation, manipulation and detection. For the purpose of photonic quantum information processing, it is essential to achieve non-linear interactions between them. Unfortunately, the non-linearities in conventional optical materials are too weak for this at the low light powers of single photons. A way to mediate strong interactions is to use a single atom inside a high-finesse cavity, which couples to the light field of impinging photons. According to an old but not yet implemented proposal [1] this can be employed to realize a two-photon quantum gate between successively reflected photons. Our current setup is well-suited to achieve this long-standing goal. We will discuss a potential implementation in our setup and will report on the current status of the experiment.

[1] L.-M. Duan and H. J. Kimble, Phys. Rev. Lett. 92, 127902 (2004)