Quantum hardware researchers at Intel have unveiled a revolutionary 300-millimeter cryogenic probing process. This process is designed to gather vast amounts of data on the performance of spin qubit devices across entire wafers using complementary metal oxide semiconductor (CMOS) manufacturing techniques.
Key points:
- Enhanced Data Collection: The new probing process, combined with improved qubit device yield, has significantly increased the volume of data available for analyzing uniformity. This is a crucial step in the journey to scale up quantum computers.
- High Gate Fidelity: Researchers discovered that single-electron devices on these wafers excel as spin qubits, achieving an impressive gate fidelity of 99.9%. This fidelity level sets a new benchmark for qubits manufactured using CMOS techniques.
- Compact and Denser Qubits: Spin qubits, measuring approximately 100 nanometers across, are denser compared to other qubit types like superconducting qubits. This density enables the creation of more complex quantum computers on a single chip of the same size.
- Cutting-Edge Fabrication: Leveraging extreme ultraviolet (EUV) lithography, Intel managed to achieve these tight dimensions while ensuring high-volume manufacturing capability.
Looking ahead, Intel aims to further enhance these techniques by:
Adding more interconnect layers to create 2D arrays with increased qubit count and connectivity. Demonstrating high-fidelity two-qubit gates on its industry manufacturing process. Continuing efforts to scale quantum devices and improve performance with its next-generation quantum chip, prioritizing the development of fault-tolerant quantum computers with millions of uniform qubits.
An Intel paper on this topic has been published in the journal Nature.