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Q: Fachverband Quantenoptik und Photonik

Q 55: Poster VI

Q 55.17: Poster

Donnerstag, 14. März 2024, 17:00–19:00, Tent B

Elements for quantum computing with trapped ions using cryogenic electronics — •Rodolfo Munoz-Rodriguez, Dorna Niroomand, Ivan Boldin, Daniel Busch, Patrick Huber, Markus Nünnerich, and Christof Wunderlich — Department of Physics, School of Science and Technology, University of Siegen, 57068 Siegen, Germany

Coherently controlling internal and motional degrees freedom of trapped ions is a prerequisite for using them for quantum information processing. Scaling up ion traps such that control of a large number of ions becomes possible requires typically excellent vacuum (XHV) and low heating rates of the ions motion, both are achieved in a cryogenic environment. At the same time, electronics generating electro-magnetic fields for ion control should be placed on or near micro-structured traps.

We set up an apparatus for investigating cryogenic (4 K) planar ion traps with electrodes controlled by cryogenic digital-to-analog-converters (DACs). Our trap chip architecture includes elements for creating a static magnetic field gradient which allows the use of radio frequency fields for coherent control. The integrated DACs allow for flexibly shaping the trapping potential for the targeted control and optimization of the interaction between ions for specific gate operations, and transport ions between different trapping zones. The first trap generation will consist of a single layer metallization layer, a single processing zone, 26 DC electrodes and a combination of integrated and external DACs.

Keywords: Planar ion traps; Quantum computing; Ytterbium ion cooling; Barium ion cooling; Cryogenic electronics