Josephson effect in fermionic superfluids across the BEC-BCS crossover

@article{Valtolina2015JosephsonEI,
  title={Josephson effect in fermionic superfluids across the BEC-BCS crossover},
  author={Giacomo Valtolina and Alessia Burchianti and Andrea Amico and Elettra Neri and Klejdja Xhani and Jorge Amin Seman and A. Trombettoni and Augusto Smerzi and Matteo Zaccanti and Massimo Inguscio and Giacomo Roati},
  journal={Science},
  year={2015},
  volume={350},
  pages={1505-1508}
}
The Josephson effect is a macroscopic quantum phenomenon that reveals the broken symmetry associated with any superfluid state. Here we report on the observation of the Josephson effect between two fermionic superfluids coupled through a thin tunneling barrier. We show that the relative population and phase are canonically conjugate dynamical variables throughout the crossover from the molecular Bose-Einstein condensate (BEC) to the Bardeen-Cooper-Schrieffer (BCS) superfluid regime. For larger… CONTINUE READING
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