Cryogenic ion trap system for high-fidelity near-field microwave-driven quantum logic
Marius Weber, Clemens Löschnauer, J Wolf, Mario F. Gely, R Hanley, Joseph F. Goodwin, Christopher J. Ballance, T. P. Harty, D M Lucas · Quantum Science and Technology · 2023
Abstract We report the design, fabrication, and characterization of a cryogenic ion trap system for the implementation of quantum logic driven by near-field microwaves. The trap incorporates an on-chip microwave resonator with an electrode geometry designed to null the microwave field component that couples directly to the qubit, while giving a large field gradient for driving entangling logic gates. We map the microwave field using a single 43Ca+ ion, and measure the ion trapping lifetime and motional mode heating rates for one and two ions.