The photo shows a single positively-charged strontium atom held in between two metal electrodes surrounding it (zoom in to see the atom, a pinpoint of light). The photograph was made possible by utilizing a laser of blue-violet colour - this forced the atom to absorb and re-emit the light particles sufficiently quickly enough for an ordinary camera to capture the scene in a long exposure.
This photo demonstrates the pristine platform for exploring and taking advantage of the unique properties of quantum physics. Laser-cooled atomic ions can serve as extremely accurate clocks and sensors, or even as building blocks for future quantum computers.
Read more about this fascinating study at: https://www.epsrc.ac.uk/newsevents/news/single-trapped-atom-captures-science-photography-competitions-top-prize/
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