Researchers from Sandia National Laboratories and Quantinuum have introduced "Logical GST," a protocol that provides the first self-consistent, full tomographic reconstruction of a universal single-qubit logical gate set. This was implemented on a single logical qubit encoded in the [[7, 1, 3]] Steane code on the Quantinuum System Model H1-1.…
Quantinuum's Chief Scientist, Harry Buhrman, argues that high physical fidelity in quantum gates is more critical than raw gate speed for achieving fault-tolerant quantum computing. He highlights Quantinuum's trapped-ion architecture as superior to superconducting platforms due to its low error rates, which significantly reduce the resources needed for quantum error…
Physicists at Forschungszentrum Jülich, RWTH Aachen University, and the University of Cologne have achieved record-breaking 6.8-nanosecond single-qubit gate operations with over 99.98% fidelity on a superconducting transmon processor. Their "R2D" pulse-shaping method effectively suppresses multi-photon leakage, allowing for ultrafast gates while maintaining high fidelity. This advancement, detailed in Nature Communications,…
