Quantum breakthrough: real-time tracking of qubit performance fluctuations

Niels Bohr Institute researchers developed a system that tracks qubit energy loss fluctuations in real time, revealing that even stable qubits can degrade in milliseconds. Previous methods took up to a minute per measurement, far too slow to capture rapid shifts caused by microscopic material defects. The adaptive measurement system, built with commercially available FPGA hardware, enables researchers to see previously invisible instabilities. The finding has direct implications for building reliable quantum computers, as it reveals the true (and often unstable) behavior hidden behind averaged measurements.

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