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A 2x2 quantum dot array in silicon with fully tuneable pairwise interdot coupling
Wee Han Lim, Tuomo Tanttu, Tony Youn +12
Recent advances in semiconductor spin qubits have achieved linear arrays exceeding ten qubits. Moving to two-dimensional (2D) qubit arrays is a critical next step to advance toward…
A 300 mm foundry silicon spin qubit unit cell exceeding 99% fidelity in all operations
Paul Steinacker, Nard Dumoulin Stuyck, Wee Han Lim +24
Fabrication of quantum processors in advanced 300 mm wafer-scale complementary metal-oxide-semiconductor (CMOS) foundries provides a unique scaling pathway towards commercially via…
Certifying the quantumness of a nuclear spin qudit through its uniform precession
Arjen Vaartjes, Martin Nurizzo, Lin Htoo Zaw +16
Spin precession is a textbook example of dynamics of a quantum system that exactly mimics its classical counterpart. Here we challenge this view by certifying the quantumness of ex…
Violating Bell's inequality in gate-defined quantum dots
Paul Steinacker, Tuomo Tanttu, Wee Han Lim +15
Superior computational power promised by quantum computers utilises the fundamental quantum mechanical principle of entanglement. However, achieving entanglement and verifying that…
Spin Qubits with Scalable milli-kelvin CMOS Control
Samuel K. Bartee, Will Gilbert, Kun Zuo +14
A key virtue of spin qubits is their sub-micron footprint, enabling a single silicon chip to host the millions of qubits required to execute useful quantum algorithms with error co…
Schrödinger cat states of a nuclear spin qudit in silicon
Xi Yu, Benjamin Wilhelm, Danielle Holmes +17
High-dimensional quantum systems are a valuable resource for quantum information processing. They can be used to encode error-correctable logical qubits, which has been demonstrate…