Fig. 5: Precision of magnetic sensing for CM, SWM, and BWM schemes.
From: Improving the precision of optical metrology by detecting fewer photons with biased weak measurement
The precision ΔB obtained using CM, SWM, and BWM schemes are plotted versus the incident photon number n. CM and SWM achieve their best precisions of 2.2 × 10−4T and 3.63 × 10−5T with 5.9 × 106 and \(9.7 \times 10^7\) photons, respectively. Afterward, the precisions degrade since DSE occurs. Because of the extinction effect, the precision of BWM keeps to be improved up to \(5.08 \times 10^{10}\) photons and the best precision is \(4.05 \times 10^{ - 6}T\). The theoretical precisions calculated from the FI for CM, SWM, and BWM schemes are shown as the solid lines in the same color with their respective experimental results
