D-Wave Systems, a Canada-based world leader in quantum computing systems, software and services, announced some preliminary findings from the test chip it designed to characterize the fluxonium superconducting qubits it plans to use. With fluxonium, a new approach, the properties of flux and charge qubit circuits are combined. This made fluxonium an attractive candidate qubit.
2D single fluxonium test circuits produced by D-Wave are the state-of-the-art product reported in the scientific literature. D-Wave, which follows a different path from the transmon technique of superconductor processor manufacturers such as IBM, Google and Rigetti, thinks fluxonium is superior. This advantage is potentially due to the fact that it offers better relaxation (T1) coherence times, provides a greater separation between low and high energy states, resulting in lower state leakage, and operates at very low frequencies, eliminating control complexity.
D-Wave, which currently characterizes the chip, has previously reported measurements of T100 (relaxation) times in the range of 1 microseconds, T10R (Ramsey phase decay times) in the range of 2 microseconds, and effective fluxonium temperature of 18 milliKelvin. They also stated that they were very pleased that these early findings were comparable to other fluxonium circuits in the literature.
D-Wave, the world's first commercial quantum computer supplier, which presented its preliminary findings in a press release on September 13, 2023, announced that they have made significant progress in the development of high-coherence qubits. Pioneered by Michel Devoret and his colleagues at Yale University in 2009, the fluxonium qubit has become an attractive candidate for use in quantum computing architectures with its next-generation gate model.
“These results demonstrate that fluxonium is a suitable candidate qubit for D-Wave's gate model quantum computing architectures,” said Mark Johnson, senior vice president of quantum technologies and systems products at D-Wave. "Furthermore, in doing this work we learned that fluxonium can overcome some of the known shortcomings of competing superconducting gate model qubits." said. “We believe this will have a significant impact on D-Wave's hardware development and strengthen our technical leadership by demonstrating that we can design, manufacture and operate high-coherence fluxonium qubits comparable to the best in the world.”
📩 16/09/2023 11:22