Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.24: Poster

Tuesday, March 7, 2017, 17:00–19:00, P OG1+2

Toward a photon-photon quantum logic gate based on Rydberg interactions — •Steffen Schmidt-Eberle, Daniel Tiarks, Thomas Stolz, Stephan Dürr, and Gerhard Rempe — MPI für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching

The experimental realization of a photon-photon quantum logic gate based on a scheme which is not inherently probabilistic was a long-standing goal, which has been reached only recently, using a single atom in an optical resonator [1]. We pursue the same goal following a different approach in which the required strong interactions are generated by the gigantic van der Waals interaction between Rydberg atoms. A crucial ingredient needed for such a gate is an optical π phase shift generated by a single photon, which we demonstrated recently [2]. We now extended the scheme of Ref. [2] by storing an incoming photonic polarization qubit in a quantum memory consisting of an atomic ground state and a Rydberg state. We report on the implementation of this scheme in our experimental setup and quantitative studies of its performance.

B. Hacker et al. Nature 536, 193 (2016).
D. Tiarks et al. Science Advances 2, e1600036 (2016).