High-fidelity operation of encoded spin qubits on Intel Tunnel Falls

Quantum computers executing complex algorithms with stable logical qubits will require large numbers of highly coherent physical qubits in concert with precise pulse control. Silicon quantum dot based qubits provide both the foundation for high-fidelity qubits, and the ability to leverage the proven scalability and reliability of semiconductor manufacturing over the past decades. In fact, multiple spin-qubit encodings are available as promising candidates to form the cornerstone of scalable quantum computation in Silicon. High throughput characterizations and advanced EUV fabrication on the Intel 300mm fabrication line used for next generation processors have led to the development of the newly released Intel Tunnel Falls quantum chip available to research groups in the community, which lends itself to exploring different qubit encodings on devices with up to 12 quantum dots. The Exchange-Only (EO) encoding is one of them, allowing for complete qubit control with only baseband pulses. Here, we present our first results on high-fidelity spin qubit control based on the EO encoding, as well as continued progress in high-fidelity operation of single-spin qubits.