Bose–Einstein condensates

Microscopic magnetic-field imaging

Abstract

Today's magnetic-field sensors1 are not capable of making measurements with both high spatial resolution and good field sensitivity. For example, magnetic force microscopy2 allows the investigation of magnetic structures with a spatial resolution in the nanometre range, but with low sensitivity, whereas SQUIDs3 and atomic magnetometers4 enable extremely sensitive magnetic-field measurements to be made, but at low resolution. Here we use one-dimensional Bose–Einstein condensates in a microscopic field-imaging technique that combines high spatial resolution (within 3 micrometres) with high field sensitivity (300 picotesla).

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Figure 1: One-dimensional Bose–Einstein condensate as a magnetic-field sensor.

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Correspondence to Jörg Schmiedmayer.

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The authors declare no competing financial interests.

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Wildermuth, S., Hofferberth, S., Lesanovsky, I. et al. Microscopic magnetic-field imaging. Nature 435, 440 (2005). https://doi.org/10.1038/435440a

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