Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Optics II
Q 11.7: Vortrag
Montag, 6. März 2017, 18:30–18:45, P 5
High temperature superconducting surface ion traps. — •Kirill Lakhmanskiy1, Philip Holz1, Dominic Schärtl1, Muir Kumph2, Yves Colombe1, and Rainer Blatt1,3 — 1Institute for Experimental Physics, University of Innsbruck, Austria — 2IBM Thomas J. Watson Research Center, USA — 3Institute for Quantum Optics and Quantum Information, Innsbruck, Austria
Ion traps are used as a tool to perform quantum simulations [1] and quantum computation [2]. One approach to achieve large scale quantum systems is to utilize surface ion traps. However, the closeness of the ions to the trap’s surface leads to an increase of the heating rate of the motional state, which degrades the fidelity of quantum operations. The origin of this heating is not well understood [3]. 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. By measuring the motional heating rate of a trapped ion, we observe large changes in the magnitude of the electric field noise in a small temperature range around Tc, which is consistent with our calculations of the Johnson noise.
[1] R. Blatt and C.F. Roos, Nature Phys. 8, 277 (2012)
[2] R. Blatt and D. Wineland, Nature 453, 1008 (2008)
[3] M. Brownnutt, M. Kumph, P. Rabl, and R. Blatt, Rev. Mod. Phys. 87, 1419 (2015)