Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 38: Precision Spectroscopy of Atoms and Ions III (joint session A/Q)
Q 38.3: Vortrag
Mittwoch, 4. März 2026, 15:15–15:30, N 3
Adaptive, symmetry-informed Bayesian metrology for precise measurements — •Matt Overton1, Jesús Rubio2, Nathan Cooper1, Janet Anders3, and Lucia Hackermüller1 — 1University of Nottingham, Nottingham, UK — 2University of Surrey, Guildford, UK — 3University of Exeter, Exeter, UK
High-precision measurements are crucial for addressing major scientific and technological challenges; however, obtaining these measurements can be time-consuming. Here, we present a systematic strategy for parameter estimation in the low-data limit that integrates experimental control parameters and natural symmetries. The method is guided by a Bayesian quantifier of precision gain, enabling adaptive optimisation tailored to any experiment.
This adaptive strategy is demonstrated in a quantum technology experiment, in which ultracold caesium atoms are confined in a micromachined hole in an optical fibre. We find a five-fold reduction in the fractional variance of the estimated parameter, compared to the standard measurement procedure. Equivalently, our strategy achieves a target precision with a third of the data points previously required. Such enhanced device performance and accelerated data collection will be essential for applications in quantum computing, communication, metrology, and the wider quantum technology sector.
Keywords: Bayesian statistics; cold atoms; precision measurement; quantum technology