SAMOP 2021 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 1: Implementations: Atoms, Ions and Photons
QI 1.4: Vortrag
Montag, 20. September 2021, 12:00–12:15, H4
Towards a fault-tolerant universal set of microwave driven quantum gates with trapped ions — •Nicolas Pulido1,2, Markus Duwe1,2, Hardik Mendpara1,2, Amado Bautista1,2, Giorgio Zarantonello3, 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, Boulder, Colorado 80303
A fully operational quantum computer will require a complete set of quantum gates, with sufficiently low gate-errors to allow fault tolerance [1]. Here, we consider the implementation of single- and two-qubit gates using microwaves [2] as a scalable alternative to the more widely spread optical addressing techniques, which are typically limited by photon scattering. The control fields are generated by microwave conductors embedded directly into the trap structure. We obtain a preliminary infidelity of 10−4 for single-qubit gates and approaching 10−3 for two-qubit operations using this fully integrated approach. The two-qubit gates are shown to be robust with respect to motional quantum bus noise as a result of a tailored amplitude modulation protocol [3].
[1] E. Knill et al., Nature 434, 39-44 (2005)
[2] C. Ospelkaus et al., Phys. Rev. Lett. 101 090502 (2008)
[3] G. Zarantonello et al., Phys. Rev. Lett. 123 260503 (2019)