Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 42: Poster: Quantum Optics and Photonics III
Q 42.28: Poster
Mittwoch, 2. März 2016, 16:30–19:00, Empore Lichthof
High temperature superconducting surface ion traps — •Dominic Schärtl1, Kirill Lakhmanskiy1, Philip Holz1, Muir Kumph2, Yves Colombe1, and Rainer Blatt1,2 — 1Institute for Experimental Physics, University of Innsbruck, Austria — 2Institute for Quantum Optics and Quantum Information, Innsbruck, Austria
Ion traps are a promising tool for quantum simulators and quantum computers [1]. Microfabricated surface traps offer the possibility to miniaturize ion traps, which is a possible route towards a scalable quantum computer. However, the proximity of the ions to the surface of the trap leads to motional heating, the origin of which is not well understood [2].
To investigate different sources of motional heating, we operate a surface ion trap made of YBCO, a high-temperature superconducting material. The trap is designed in such a way that Johnson noise should be the dominant source of motional heating above the critical temperature Tc ≈85 K, whereas below Tc it should be negligible compared to other noise sources. Using a local heating element, we adjust the temperature of the trap chip and observe the superconducting transition by measuring the Q factor of the RF resonant circuit or the resistance of on-chip structures. Probing the motional heating of a trapped ion, we expect to observe pronounced changes in the characteristics of the electric field noise in a small temperature range around Tc.
[1] R. Blatt, C.F. Roos, Nature Phys. 8, 277 (2012)
[2] M. Brownnutt, M. Kumph, P. Rabl, and R. Blatt, arXiv:1409.6572 (2014)