2025/07/10 by Shahar Monsa, Yair Chasid, Monsa, Shahar +7
Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Mechanical and Optical Resonators #Optics (physics.optics) #Quantum Physics (quant-ph) #Quantum optics and atomic interactions
paper · pdf · doi:10.48550/arxiv.2507.07672
openalex publication_date 2025/07/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on an optical magnetometer enhanced by vacuum-squeezed light, employing an Mx magnetometer based on 87Rb vapor in a micrometer-scale cell (~100 μm). Using the well-established polarization self-rotation effect in a room-temperature 87Rb vapor cell, we achieve -3 dB of vacuum squeezing within the noise spectral window of 100 Hz to several MHz, corresponding to 3.5 dB squeezing when accounting for optical losses. Leveraging this level of squeezing, we demonstrate a magnetic field sensitivity of approx. 1 pT/√(Hz). The combination of vacuum-squeezed light and micrometer-scale vapor cells paves the way for compact, low-power-consumption atomic sensors with enhanced performance.