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Sensing electric and magnetic fields with Bose-Einstein Condensates

S. Wildermuth·S. Hofferberth·I. Lesanovsky·S. Groth·I. Bar-Joseph·P. Krueger·J. Schmiedmayer
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Abstract

We discuss the application of Bose-Einstein condensates (BECs) as sensors for magnetic and electric fields. In an experimental demonstration we have brought one-dimensional BECs close to micro-fabricated wires on an atom chip and thereby reached a sensitivity to potential variations of ~10e-14eV at 3 micron spatial resolution. We demonstrate the versatility of this sensor by measuring a two-dimensional magnetic field map 10 micron above a 100-micron-wide wire. We show how the transverse current-density component inside the wire can be reconstructed from such maps. The field sensitivity in dependence on the spatial resolution is discussed and further improvements utilizing Feshbach resonances are outlined.

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S. Wildermuth, S. Hofferberth, I. Lesanovsky, S. Groth, I. Bar-Joseph, P. Krueger, J. Schmiedmayer. 2005-12-21. Sensing electric and magnetic fields with Bose-Einstein Condensates. https://doi.org/10.1063/1.2216932

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