Australian Scientists Achieve Breakthrough in Scalable Quantum Control with CMOS-Spin Qubit Chip

CMOS Chip Controls Spin Qubits at 100mK - Australia Breakthrough

University of Sydney team builds first CMOS chip to control multiple spin qubits at ultralow temps, solving key bottleneck in quantum computer scaling.

semiconductorsinsight.com

Australian scientists at the University of Sydney, led by Prof. David Reilly, just pulled off a world-first: a tiny CMOS “chiplet” that lives at 100 mK and wrangles multiple silicon spin qubits using only microwatts of power. By baking the qubit control electronics right into a cryogenic-friendly CMOS package, they’ve ditched the bulky, heat-pumping wiring and room-temperature gear that’s been the scaling bottleneck for quantum machines.

In tests, their two-chip prototype (one CMOS controller + one spin-qubit chip) nailed two-qubit entangling gates with zero extra quantum drama—“the qubits hardly notice the switching of 100,000 transistors next door,” as Reilly jokes. This breakthrough paves the way for monolithic or chiplet-based quantum-classical integration, bringing the dream of millions of silicon qubits and industrial-scale quantum computers a big step closer.