Bye-bye electrons? Circuit made from flowing atoms: The researchers used a complex array of lasers to trap and shape the blob into a torus. A further pair of lasers, one in a rotating configuration, gave the atoms just enough energy to circulate in unison around the ring, but not so much energy that the condensate decohered...
His team also pinched off part of the torus with another laser, restricting the flow of atoms, but not stopping them entirely. In electrical circuits, the closest analogy to this is a Josephson junction, a gap over which current flows between two superconductors.
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