Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics I
Q 31.17: Poster
Dienstag, 7. März 2017, 17:00–19:00, P OG1+2
Anomalous heating in ion traps: where does the noise originate? — •Carsten Henkel1, Henning Kaufmann2, and Ulrich Poschinger2 — 1Universität Potsdam — 2Johannes-Gutenberg-Universität Mainz
Trapped ions that are laser-cooled to the ground state of a Paul trap provide a promising platform for quantum information processing and surface analysis. The ions are subject to fluctuating electric fields emanating from the surrounding electrodes which lead to a finite heating rate whose detailed behaviour is not yet fully understood (patch potentials, surface adsorbates, temperature and distance dependence ...)[1]. Building on a recent model with metallic electrodes covered by a thin lossy dielectric [2], we investigate the spatial distribution of the charge fluctuations that generate the electric field noise. We analyze for example the interference that is at the origin of the maximum of noise for films with a certain thickness [3, 4]. The aim is to mitigate anomalous heating with suitably coated electrodes that screen the dominant noise sources.
[1] M. Brownnutt, M. Kumph, P. Rabl, and R. Blatt, Rev. Mod. Phys. 87 (2015) 1419
[2] M. Kumph, C. Henkel, P. Rabl, M. Brownnutt, and R. Blatt, New J. Phys. 18 (2016) 023020
[3] S. Bauer, Am. J. Phys. 60 (1992) 257
[4] S. A. Biehs, D. Reddig, and M. Holthaus, Eur. Phys. J. B 55 (2007) 237; S. A. Biehs, Eur. Phys. J. B 58 (2007) 423