Abstract
Magnetometers are among the most widely used physical devices, finding applications in medicine, geology, cosmology, fundamental physics, and other areas (see Refs. [1, 2] for review articles). For instance, vector magnetometers were employed recently to guide the drilling of relief wells to handle the oil spill in the Gulf of Mexico [3]. In spite of the impressive history of ultrasensitive magnetometry, the field is still active and significant efforts are underway to enhance accuracy of existing devices and to create novel ones possessing superior features. As an example of this progress, Valeriy Yudin and colleagues at the Institute for Laser Physics in Novosibirsk, Russia, now report in Physical Review A[4] a way to employ the interaction of light with an atomic vapor to achieve senstive all-optical vector magnetometry.
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