Grujić, Zoran D. Koss, Peter A. Bison, Georg Weis, Antoine 2015-05-21 We present a laser-based atomic magnetometer that allows inferring the modulus of a magnetic field from the free Larmor precession of spin-oriented Cs vapour atoms. The detection of free spin precession (FSP) is not subject to systematic readout errors that occur in phase feedback-controlled magnetometers in which the spin precession is actively driven by an oscillating field or a modulation of light parameters, such as frequency, amplitude, or polarization. We demonstrate that an FSP-magnetometer can achieve a ∼200 fT/√Hz sensitivity (<100 fT/√Hz in the shotnoise limit) and an absolute accuracy at the same level. application/pdf https://folia.unifr.ch/global/documents/304330 https://folia.unifr.ch/documents/304330/files/wei_saa.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1140/epjd/e2015-50875-3 info:eu-repo/semantics/openAccess License undefined The European Physical Journal D. - 2015, vol. 69, no. 5, p. 1–10 info:eu-repo/classification/udc/53 A sensitive and accurate atomic magnetometer based on free spin precession http://purl.org/coar/resource_type/c_6501