The quantum computing landscape is expanding with new qubit technologies, offering diverse approaches to building powerful processors. Two notable advancements involve quantum dots and diamond vacancies.

HRL Laboratories, a descendant of Howard Hughes' research, has developed a novel qubit system using manufactured quantum dots that trap single electrons. Unlike typical methods relying on microwaves, HRL's approach uses electronic control via wiring, significantly reducing the complexity of the refrigeration system. Their processor, featuring 18 qubits, demonstrated a logical error rate below 1 percent using an error-correction code. This technology has since been acquired by IBM.

IBM's Director of Research, Jay Gambetta, sees value in HRL's silicon-based approach, viewing it as complementary to IBM's existing transmon qubit technology. This acquisition could allow IBM to integrate HRL's innovations into future systems, leveraging the strengths of both qubit types for tasks like error correction and magic state creation.

Separately, a Delft University of Technology team is advancing quantum dot qubits by enabling electron and spin mobility. Their recent work introduces a "bus" system that allows electrons to be moved and stored, offering greater flexibility in qubit connectivity and entanglement, combining manufacturing advantages with the adaptability of atom-based systems.