Berlin 2014 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology

Q 16.22: Poster

Monday, March 17, 2014, 16:30–18:30, Spree-Palais

Towards strong coupling in an ion-trap fiber-cavity apparatus — •Klemens Schüppert¹, Birgit Brandstätter¹, Bernardo Casabone¹, Konstantin Friebe¹, Sebastien Garcia², Jakob Reichel², Tracy Northup¹, and Rainer Blatt^2,3 — ¹Institute of Experimental Physics, University Innsbruck, Austria — ²Laboratoire Kastler Brossel ENS / UPMC-Paris 6 / CNRS, Paris, France — ³Institute of Quantum Optics and Quantum Information, Innsbruck, Austrian Academy of Sciences

With atoms coupled to optical cavities it is possible to build up quantum interfaces between stationary and flying qubits. A quantum network based on these interfaces offers a compelling solution to the challenge of scalability in quantum computing. By using fiber-based cavities, we expect to reach the strong coupling regime of cavity quantum electrodynamics with single ions, which has not previously been accessed.

To that end, we are further developing and testing the laser ablation of fiber facets, which are then coated to produce high-finesse fiber mirrors. Specifically, we plan to produce cavities of about 8 µm mode waist and 500 µm in length for use in our integrated ion-trap cavity setup. In parallel, we are currently optimizing trapping parameters for calcium ions in our miniaturized trap.