The international joint research lab TRiAC (TRapped-Ion integrated Atomic-photonic Circuit)  builds on a long scientific collaboration between Osaka University, Japan, and QUEST at PTB, Germany, on trapped ion research. Created by the groups of Tanja Mehlstäubler, Christian Ospelkaus, Utako Tanaka and Kazuhiro Hayasaka, TriAC will push the development of ion traps and their applications on an international level, encourage cooperative research and promote researcher exchanges.

Gold coated sapphire chip with surface-electrode ions trap to store parallel strings of coupled ions

One example of our groups' joint efforts are microfabricated ion traps. The design seen in the video was done by the Osaka group and published in an early work[1]. The gold chips were fabricated on a three-inch sapphire wafer in the cleanroom facility at PTB and send to Japan for trap operation and characterization. The new design aims to trap one or two parallel ion strings as close as 32 µm to perform quantum simulations of coupled spin systems or the emulation of a well-controlled two-dimensional nanofriction model[2].


    • [1] U. Tanaka et al.: Design of a surface electrode trap for parallel ions strings, J. Phys. B: At. Mol. Opt. Phys. 47, 035301 (2014)
    • [2] J. Kiethe et al: Probing nanofriction and Aubry-type signatures in a finite self-organized system, Nat. Commun. 8, 15364 (2017)