Assessment of a Silicon Quantum Dot Spin Qubit Environment via Noise Spectroscopy

Abstract

Spin-based quantum-dot qubits in semiconductors are of interest in large-scale quantum computing, because they are naturally compatible with mature semiconductor manufacturing technologies. Electromagnetic noise spoils spin coherence, which sets the number of operations possible before the quantum information is lost over time, so a good understanding of a qubit's noise environment is required. This work uses a quantum-dot qubit metrologically, to study the environment of a silicon quantum chip, demonstrating that this technique is valuable in the quest to mitigate noise in tomorrow's quantum architectures.