@article{TEXTUAL,
      recid = {14505},
      author = {Wang, Ke and Zhang, Zhendong and Nagata, Shu and Wang,  Zhiqiang and Levin, K.},
      title = {Universal coherent atom-molecule oscillations in the  dynamics of the unitary Bose gas near a narrow Feshbach  resonance},
      journal = {Physical Review Research},
      address = {2025-02-05},
      number = {TEXTUAL},
      abstract = {Quench experiments on a unitary Bose gas around a broad  Feshbach resonance have led to the discovery of universal  dynamics. This universality manifests in the measured  atomic momentum distributions, where, asymptotically, a  quasiequilibrated metastable state is found in which both  the momentum distribution and the timescales are determined  by the particle density. In this Letter we present  counterpart studies for the case of a very narrow Feshbach  resonance of  $^{133}CS$ atoms with a width of 8.3 mG. In  dramatic contrast to the behavior reported earlier, a rapid  quench of an atomic condensate to unitarity is observed to  ultimately lead to coherent oscillations involving  dynamically produced condensed and noncondensed molecules  and atoms. The same characteristic frequency, determined by  the Feshbach coupling, is observed in all types of  particles. To understand these quench dynamics and how  these different particle species are created, we develop a  beyond Hartree-Fock-Bogoliubov dynamical framework  including a type of cross-correlation between atoms and  molecules. This leads to quantitative consistency with the  measured frequency. Our results, which can be applied to  the general class of bosonic superfluids associated with  narrow Feshbach resonances, establish a alternate paradigm  for universal dynamics dominated by quantum many-body  interactions.},
      url = {http://knowledge.uchicago.edu/record/14505},
}