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Q: Fachverband Quantenoptik und Photonik

Q 21: Quantum information: Atoms and ions III

Q 21.1: Vortrag

Dienstag, 18. März 2014, 10:30–10:45, UDL HS3038

Technologies for Quantum Control of Trapped Ions — •Florian Leupold, Joseba Alonso, Ludwig de Clercq, Matteo Fadel, Benjamin Keitch, Daniel Kienzler, Hsiang-Yu Lo, Vlad Negnevitsky, and Jonathan Home — Institute for Quantum Electronics, ETH Zürich

Scaling up quantum control to large numbers of qubits and gates is one of the main challenges in trapped-ion quantum information, and information transport is a key ingredient. One promising method for transporting quantum information stored in the internal states of trapped ions is to transport the ions themselves by dynamically changing the trapping potential. The speed of this transport has thus far been limited by the update rates of the potentials applied to the trap electrodes.

We have recently proposed to place single pole, double throw switches close to the ion trap itself, enabling the trap potentials to be changed on timescales fast compared to the oscillation frequency of the ion [1]. This could allow transport of ions over macroscopic distances within half an axial oscillation cycle.

To test this method we have built a micro-fabricated a surface-electrode ion trap in an ultra-high vacuum system cooled to 4K by a liquid helium recondenser cryostat. In this setup the control potentials are switched by CMOS electronics at the 4K stage. We have extensively tested the electronics, and are now working on first demonstrations with trapped ions.

[1] Alonso, J. et al. New J. Phys. 15 (2013)