Fast, high-fidelity laser-free gates on trapped-ion qubits at Oxford Ionics

Electronic control of trapped-ion qubits using oscillating magnetic field gradients has delivered some of the highest-fidelity quantum gates ever reported [1, 2]. However, two-qubit entangling operations using this method are typically slower than laser-based gates, limiting overall computing speeds. We demonstrate high-fidelity two-qubit entangling gates with a duration of 100 µs using a chip trap with an integrated microwave antenna, thereby reaching the typical speed of laser-based gates in a highly scalable architecture.

[1] T. P. Harty et al., Phys. Rev. Lett. 117, 140501 (2016)

[2] R. Srinivas et al., Nature 597, pp 209-213 (2021)