By IQT News posted 10 Mar 2021

(HPCWire) Through performance upgrades, Honeywell’s System Model H1 achieved a quantum volume of 512, the highest measured on a commercial quantum computer to date. It is the third time in nine months Honeywell has set a record for quantum volume on one of its systems.
The milestone represents a four-fold increase in performance for the System Model H1, which set a record when it was released in September 2020 with a quantum volume of 128.
This high performance, combined with low error mid-circuit measurement, provides unique capabilities with which quantum algorithm developers can innovate.
The System Model H1 operations have continued to improve since it was first released.
The average single-qubit gate fidelity for this milestone was 99.991(8)%, the average two-qubit gate fidelity was 99.76(3)% with fully-connected qubits, and measurement fidelity was 99.75(3)%. We ran 300 circuits with 20 shots each, using standard QV optimization techniques to yield an average of 76.82 two-qubit gates per circuit.
The System Model H1 successfully passed the quantum volume 512 benchmark, outputting heavy outcomes 73.32% of the time, which is above the 2/3 threshold with 99.54% confidence.
Honeywell’s quantum systems are accessible directly and through ecosystem partner platforms, including Microsoft’s Azure Quantum, Cambridge Quantum Computing’s tket, Zapata Computing’s Orquestra, and the Strangeworks QC platform. In addition to offering high-fidelity, fully connected qubits, our system features a unique combination of mid-circuit measurement, qubit reuse and conditional logic, which enables users to explore new classes of algorithms and to greatly reduce the number of qubits needed for certain algorithms.

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