Benchmarking the Honeywell H1 QCCD Trapped-Ion Quantum Computer

We have developed a 10 qubit quantum computer, based on the quantum charge coupled device (QCCD) architecture, using a cryogenic, 2D surface-electrode Honeywell ion trap. The QCCD is a scalable architecture for universal quantum computation using trapped ions as qubits. The device controls multiple mixed-species ion pairs of Yb⁺ and Ba⁺ to serve as a qubit and sympathetic coolant respectively.  Full connectivity is achieved by transporting qubits between custom-purpose trap zones, enabling high fidelity, parallel quantum operations with minimal crosstalk. We will report on recent techniques used to benchmark our device, utilizing algorithms that characterize gate and mid-circuit measurement fidelity. We analyze how benchmarks focused on isolating single operations predict performance in holistic benchmarks, such as quantum volume, and in practical circuits. Our results demonstrate that the low error rates achievable in small ion crystals can be successfully integrated with a QCCD trap design and ion transport.