SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 29: Implementations: Ions and Atoms (joint session QI/Q)
Q 29.3: Vortrag
Mittwoch, 8. März 2023, 11:45–12:00, F428
A universal two-qubit computational register for trapped-ion quantum processors — •Nicolas Pulido-Mateo1, 2, Hardik Mendpara1,2, Markus Duwe1,2, Giorgio Zarantonello1, 2, 3, Amado Bautista-Salvador1,2, Ludwig Krinner1,2, and Christian Ospelkaus1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2PTB, Bundesallee 100, 38116 Braunschweig — 3National Institute of Standards and Technology, 325 Broadway, Boulder, CO 80305, USA
Here we report on the realization of a two qubit universal computational register compatible with the QCCD architecture [1]. Single qubit gates are performed by addressing each ion individually via a micromotion sideband [2]. The entangling operation is implemented using an MS-type interaction, where we measure an infidelity that approaches 10−3 [3] when using partial state tomography. To characterize the single qubit gates we use a randomized benchmarking protocol [4] and obtain an infidelity of 3.8(4)× 10−3. We perform a characterization of the register by means of the cycle benchmarking protocol [5] obtaining, as a preliminary result, a composite process fidelity of 96.6(4) %. Finally we use simulation software for quantum open systems to model possible error sources and calculate an error budget.
[1] D. Kielpinski et al., Nature 417, 709 (2002).
[2] U. Warring et al., Phys. Rev. Lett. 17, 173002 (2013)
[3] M. Duwe et al., Quantum Sci. Technol. 7, 045005 (2022)
[4] C. Piltz et al., Nature Communications 5, 4679 (2014).
[5] A. Erhard et al., Nat. Commun. 10, 5347 (2019)