HRL Laboratories, LLC has announced a breakthrough in quantum computing by successfully demonstrating universal control of encoded spin qubits. The qubits are hosted by the spins of single electrons trapped in quantum dots and controlled by nearest-neighbor contact interactions that swap spin states with those of their neighbors.

This development is a significant step toward a commercial quantum computer, offering scalability and fault tolerance and providing a pathway to computational advantage. The use of isotopically enriched silicon, all-electrical and low-crosstalk-control, and the insensitivity of encoding to certain error sources combine to make this a promising development in the field of quantum computing.

Reference: Silicon encoded qubit spin achieves universality