Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics II
Q 31.3: Poster
Dienstag, 24. März 2015, 17:00–19:00, C/Foyer
Microfabricated Ion Traps for Quantum Logic and Metrology — •Amado Bautista-Salvador1,2, Martina Wahnschaffe1,2, Matthias Kohnen1,2, Teresa Feld1, Malte Niemann1, Stefan Ulmer3, and Christian Ospelkaus1,2 — 1Leibniz Universität Hannover, Germany. — 2Physikalisch-Technische Bundesanstalt, Braunschweig Germany. — 3RIKEN, Ulmer Iniative Research Unit, Japan.
Here we report on microfabrication techniques for building advanced ion traps for quantum logic and metrology. We first detail an ion trap which includes a single meander-like microwave conductor [1] and metal vias through spin-on-glass (SOG) dielectrics. The conceptual separation between feed lines and gate drive conductors into different layers will decrease residual magnetic fields. The reduction in residual magnetic fields will minimize off-resonant carrier excitations and thus improve gate fidelities [2]. On a second part, we give advances on the fabrication of a micro Penning trap for spin-motional coupling and Coulomb coupling between an (anti-)proton and a 9Be+ atomic ion. A stack of gold electrodes on thin (200 µm) silicon substrates will produce a double-well potential at a distance of 300 µm from each other with an axial trap frequency of 4 MHz and a motional state exchange time of 3.7 ms. We conclude with a discussion of techniques for loading 9Be+ and of the optical setup for bringing in the control laser beams.
[1] M. Carsjens et al., Appl. Phys. B, 114, 243-250 (2014).
[2] C. Ospelkaus et al., Nature, 476, 181-184 (2011).