QLSI project plans 16 qubit chip

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Alongside European partners, the Fraunhofer Institute for Photonic Microsystems IPMS is developing a scalable technology for silicon qubits for quantum computers.

The Fraunhofer IPMS is part of the newly launched European project QLSI (Quantum Large-Scale Integration with Silicon), which aims to develop a 16-qubit chip within four years backed with €14.6 million from the EU.

Silicon qubits can manipulated and read out quickly and are suited for quantum computing due to their small size, high fidelity and compatibility with industrial manufacturing process.

Silicon qubits have been successfully demonstrated many times in the past; the project is now focusing on demonstrating a 16 qubit chip and developing a scalable technology for industrial implementation.

Within the four-year project, a consortium of 19 partners with complementary expertise is working together. Fraunhofer IPMS’ Center Nanelectronic Technologies will be contributing a 4000 m² clean room alongside its expertise in state-of-the-art, industry-compatible CMOS semiconductor fabrication on 300 mm wafer standard.

"We intend to use our know-how and infrastructure to enable highly scalable quantum processors that build on the achievements and advantages of silicon-based semiconductor manufacturing. This concerns, for example, manufacturing processes for nanopatterning, but also material development and electrical manipulation and readout. In close cooperation with Infineon Dresden, RWTH Aachen and FZ Jülich we intend to demonstrate manufacturable and scalable qubit technology on CMOS-compatible wafer level," explained Dr. Benjamin Uhlig, business unit manager for Next Generation Computing at Fraunhofer IPMS.