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The Tiniest Superfluid Circuit in Nature

February 25, 2021

The Tiniest Superfluid Circuit in Nature

In the ac Josephson effect, an applied dc voltage produces an oscillating, or ac, current, leading to the emission of microwave photons. In the ac Josephson effect, an applied dc voltage produces an oscillating, or ac, current, leading to the emission of microwave photons. In this structure, called a Josephson junction, the current is due to the quantum tunneling of paired, superconducting electrons (so-called Cooper pairs) [1]. In the ac Josephson effect, an applied dc voltage produces an oscillating, or ac, current, leading to the emission of mic… In this variant of the Josephson effect, a constant, or dc, voltage applied to a Josephson junction produces an ac current. Analyzing tin-nickel collisions from previous experiments, they found that experimental observables offer compelling signatures that two nuclei indeed form, for a split second, a Josephson junction. But if two condensates are sufficiently close, a Cooper-pair current, whose magnitude depends on the phase difference, may flow from one condensate to the other.

Article from Physics.