Intel Quantum

In 2024, Intel's spin qubits achieved 99.9% gate fidelity, the highest reported for qubits made with all-CMOS-industry manufacturing, demonstrated in research published in Nature titled 'Probing single electrons across 300-mm spin qubit wafers.' On December 25, 2024, Intel published research on '12-Spin-Qubit Arrays Fabricated on a 300 mm Semiconductor Manufacturing Line' in Nano Letters, featuring the Tunnel Falls device consisting of 12 quantum dots arranged in a linear array - the largest number of qubits reported in a single Si/SiGe device to date. Intel researchers used a 300-millimeter cryogenic probing process, CMOS manufacturing techniques, and extreme ultraviolet (EUV) lithography to achieve tight dimensions while manufacturing in high volume. The small size of Intel's spin qubits (approximately 100 nanometers across) makes them denser than other qubit types like superconducting qubits, enabling construction of more complex quantum computers on a single chip. Intel plans to demonstrate high-fidelity two-qubit gates on its industry manufacturing process and develop 2D arrays with increased qubit count and connectivity.