Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster II

Q 55.45: Poster

Donnerstag, 11. März 2010, 16:00–19:00, Lichthof

Towards quantum networks: integrating fiber cavities and ion traps — •Birgit Brandstätter^{1, 2}, Tracy Northup¹, Maximilian Harlander¹, Piet Schmidt^{1, 3}, and Rainer Blatt^{1, 4} — ¹Institute of Experimental Physics, University Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria — ²Recipient of a DOC-fFORTE-fellowship of the Austrian Academy of Sciences at the Institute of Experimental Physics, University Innsbruck, A-6020 Innsbruck, Austria — ³present address: QUEST Institute of Experimental Quantum Metrology, PTB, D-38116 Braunschweig, Germany — ⁴Institute of Quantum Optics and Quantum Information, Austrian Academy of Sciences

Quantum networks, in which atoms at quantum nodes are linked by photonic channels, offer a compelling solution to the challenge of scalability in quantum computing. In these networks, optical cavities provide an interface between photons and atoms; however, the technical requirements for such cavities are demanding. We hope to utilize recent advances in mirrors fabricated on fiber facets in order to couple trapped calcium atoms to a high-finesse cavity with small mode volume. Our approach is twofold: first, we are investigating the perturbation of ions in a linear segmented trap by the presence of an optical fiber. This experiment provides a testbed for us to explore little-understood factors such as acceptable ion-fiber distances and the effects of fiber coatings. Second, we are developing and testing curved, coated fiber mirrors and designing an integrated ion-trap cavity setup.