Electron-spin qubit platform created atom by atom

https://phys.org/news/2023-10-qubit-platform-atom.html

"control multiple qubits simultaneously, enabling application of 1-, 2-, and 3-qubit gates... magnetic atoms placed on pristine thin insulator surface... coherently manipulate with electron spin resonance (ESR-STM), also controlling remote qubits... scalable to 10's or 100s qubits in a defect-free environment... remote manipulation of the atoms to perform qubit operations individually, without moving the tip of the STM... quantum computing, sensing, communication, and simulation"