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Quantum sensors

Quantum sensors

Quantum error correction has side effects for sensors

21 Apr 2022
Graph showing the uncorrected signal (a sine wave that dampens over time), the ideal signal (an undamped sine wave) and the corrected signal (a slightly damped sine wave with an offset in time)
Errors such as noise cause a damping of the signal relative to the ideal case. Finite-​rate quantum error correction can recover substantial parts of the lost signal strength, but it also shifts the sensing frequency, causing bias (shown as grey bars) to build up in the measurement. (Courtesy: Adapted from Rojkov et al. Phys. Rev. Lett. 128, 140503 (2022))
We are used to the idea that in medicine, simple fixes often come with side effects. Taking pain rel

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Karmela Padavic-Callaghan is a science writer and physics educator based in the US
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