Speaker
Description
Single-qubit rotation operations and two-qubit entangling gates form a universal set of quantum operations capable of performing any quantum algorithm. Here, we consider the implementation of single- and two-qubit gates using microwaves as a scalable alternative to the more widely used laser-based addressing techniques, which have fidelities that are typically limited by photon scattering [1]. The control fields are generated by microwave conductors embedded directly into the trap structure. Using this fully integrated microwave approach, we obtain a preliminary infidelity of $10^{-4}$ for single-qubit gates and approaching $10^{-3}$ for two-qubit operations. 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 [2]. Further, to better characterize the performance of two-qubit entangling gates, we will report on our recent progress in benchmarking our two-qubit quantum processor in a computational context [3,4].
[1] C. Ospelkaus et al., Phys. Rev. Lett. 101 090502 (2008)
[2] G. Zarantonello et al., Phys. Rev. Lett. 123 260503 (2019)
[3] A. Erhard \textit{et al.}, Nat. Commun. \textbf{10}, 5347 (2019)
[4] J. Gaebler \textit{et al.}, Phys. Rev. Lett. \textbf{109}, 179902 (2012)
