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Cryogenic ion trap system for high-fidelity near-field microwave-driven quantum logic (2207.11364v1)
Published 22 Jul 2022 in quant-ph
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 ${43}$Ca$+$ ion, and measure the ion trapping lifetime and motional mode heating rates for one and two ions.