Scientists Identify the Origin of Noise in Spin Qubit Quantum Processors
AI-summarised brief · reviewed before publication
Researchers from Tokyo University of Science and the National Institute of Advanced Industrial Science and Technology identified the origin of noise in silicon spin qubits, which causes frequency shifts and deteriorates gate fidelity. The team used large-scale simulations to demonstrate that charge noise from two-level fluctuators near semiconductor interfaces is the primary cause of the issue. Operating at 200 millikelvin can improve quantum gate fidelity, and refining fabrication processes could reduce noise and stabilize qubit frequencies.