A two-dimensional ultracold Fermi gas with a weak barrier behaves as an ideal Josephson junction: the supercurrent follows the sinusoidal current-phase relation, and the critical current stays finite through the BEC-BCS crossover.
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An ideal Josephson junction in an ultracold two-dimensional Fermi gas
A two-dimensional ultracold Fermi gas with a weak barrier behaves as an ideal Josephson junction: the supercurrent follows the sinusoidal current-phase relation, and the critical current stays finite through the BEC-BCS crossover.