New qubit circuit enables quantum operations with higher accuracy

https://phys.org/news/2023-09-qubit-circuit-enables-quantum-higher.html

"superconducting fluxonium qubit with longer lifespan (coherence times >1 ms., 10X longer) operates between qubits with greater accuracy: fluxonium fundamentally better qubit than transmon, coupling element between 2 fluxonium qubits (with tunable transmon coupler in middle enabling stronger coupling) enables them to perform highly accurate logical gate operations (fidelity 99.9%), suppressing background interactions causing quantum operation errors... flexible parameter selection enables scaling up"