@article{11880,
  author = {Scott Smale and Peiru He and Ben Olsen and Kenneth Jackson and Haille Sharum and Stefan Trotzky and Jamir Marino and Ana Maria Rey and Joseph Thywissen},
  title = {Observation of a transition between dynamical phases in a quantum degenerate Fermi gas},
  abstract = {A proposed paradigm for out-of-equilibrium quantum systems is that an analog of quantum phase transitions exists between parameter regimes of qualitatively distinct time-dependent behavior. Here, we present evidence of such a transition between dynamical phases in a cold-atom quantum simulator of the collective Heisenberg model. Our simulator encodes spin in the hyperfine states of ultracold fermionic potassium. Atoms are pinned in a network of single-particle modes, whose spatial extent emulates the long-range interactions of traditional quantum magnets. We find that below a critical interaction strength, magnetization of an initially polarized fermionic gas decays quickly, while above the transition point, the magnetization becomes long-lived because of an energy gap that protects against dephasing by the inhomogeneous axial field. Our quantum simulation reveals a nonequilibrium transition predicted to exist but not yet directly observed in quenched s-wave superconductors.},
  year = {2019},
  journal = {Science Advances},
  volume = {5},
  pages = {eaax1568},
  month = {2019-08},
  url = {https://advances.sciencemag.org/content/5/8/eaax1568.full},
  doi = {10.1126/sciadv.aax1568},
}