Recent Developments in Quantum Dot Technology and Diamond Vacancies

Recent advancements in quantum computing highlight the potential of various systems to serve as qubits, including atoms, ions, photons, electrons, and manufactured devices. The scalability of these technologies is a key factor in their development. While some technologies can support thousands of qubits, others are still in the early stages, with companies asserting their potential for effective scaling. Notably, quantum dots that hold a single electron are gaining attention due to their manufacturability using traditional processor technology. Two recent papers have been published on this topic, with IBM acquiring a company that developed a promising quantum dot technology. Additionally, another company has demonstrated a processor capable of holding 100 individual electrons in diamond defects, a technology that shows potential for scalability.