Experimental system design for the integration of trapped-ion and superconducting qubit systems

D De Motte; A R Grounds; M Rehák; A Rodriguez Blanco; B Lekitsch; G S Giri; P Neilinger; G Oelsner; E Il'ichev; M Grajcar; W K Hensinger

doi:10.1007/s11128-016-1368-y

Experimental system design for the integration of trapped-ion and superconducting qubit systems

Quantum Inf Process. 2016;15(12):5385-5414. doi: 10.1007/s11128-016-1368-y. Epub 2016 Jul 12.

Authors

D De Motte¹, A R Grounds¹, M Rehák², A Rodriguez Blanco¹, B Lekitsch¹, G S Giri¹, P Neilinger², G Oelsner³, E Il'ichev^{3

4}, M Grajcar², W K Hensinger¹

Affiliations

¹ Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH UK.
² Department of Experimental Physics, Comenius University, 84248 Bratislava, Slovakia.
³ Leibniz Institute of Photonic Technology, P.O. Box 100239, 07702 Jena, Germany.
⁴ Russian Quantum Center, 100 Novaya Street, Skolkovo, Moscow region 143025 Russia.

Abstract

We present a design for the experimental integration of ion trapping and superconducting qubit systems as a step towards the realization of a quantum hybrid system. The scheme addresses two key difficulties in realizing such a system: a combined microfabricated ion trap and superconducting qubit architecture, and the experimental infrastructure to facilitate both technologies. Developing upon work by Kielpinski et al. (Phys Rev Lett 108(13):130504, 2012. doi:10.1103/PhysRevLett.108.130504), we describe the design, simulation and fabrication process for a microfabricated ion trap capable of coupling an ion to a superconducting microwave LC circuit with a coupling strength in the tens of kHz. We also describe existing difficulties in combining the experimental infrastructure of an ion trapping set-up into a dilution refrigerator with superconducting qubits and present solutions that can be immediately implemented using current technology.

Keywords: Dilution refrigerator; Quantum computing; Quantum hybrid system; Superconducting qubits; Trapped ions.