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Observation of isolated monopoles in a quantum field

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Science  01 May 2015:
Vol. 348, Issue 6234, pp. 544-547
DOI: 10.1126/science.1258289

Making a monopole in an atomic gas

Some “grand unified theories” of physics predict the existence of the so-called magnetic monopole. No such particles have been seen, but analogs of monopoles may be observable in quantum fluids. Ray et al. created such an analog in a gas of ultracold 87Rb atoms with three spin states at their disposal. The authors used a protocol involving external magnetic fields with particular spatial distributions to create and observe a monopole-like spin texture in the gas.

Science, this issue p. 544

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