2020/09/16 by Naota Sekiguchi, Aki Torii, Sekiguchi, Naota +11
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #physics.atom-ph
paper · pdf · doi:10.48550/arxiv.2009.07569
12 pages, 3 figures, submitted to Physical Review Letters
arxiv created 2020/09/16 · arxiv updated 2020/09/17
An improved spatial magnetometer using a spinor Bose-Einstein condensate of 87Rb atoms is realized utilizing newly developed two-polarization phase contrast imaging. The optical shot noise is suppressed by carefully choosing the probe parameters. We attain a dc-magnetic field sensitivity of 7.7 \rm pT/√(Hz) over a measurement area of 28 \rm μm2. The attained sensitivity per unit area is superior to that for other modern low-frequency magnetometers with micrometer-order spatial resolution. This result is a promising step for realizing quantum-enhanced magnetometry surpassing classical methods.