• DOI:10.1126/science.abf0147
• Corpus ID: 221703340

Generalized hydrodynamics in strongly interacting 1D Bose gases

@article{Malvania2020GeneralizedHI,
  title={Generalized hydrodynamics in strongly interacting 1D Bose gases},
  author={Neel Malvania and Yicheng Zhang and Yuan Le and J{\'e}r{\^o}me Dubail and Marcos Rigol and David S. Weiss},
  journal={Science},
  year={2020},
  volume={373},
  pages={1129 - 1133}
}

• N. Malvania, Yicheng Zhang, +3 authors D. Weiss
• Published 14 September 2020
• Physics
• Science

Description Monitoring quantum dynamics Reducing the dimensionality of a quantum system of interacting particles can simplify its physics. Such reduction is possible in ultracold atomic gases, where a lattice of one-dimensional (1D) gases can be generated using optical potentials. Malvania et al. studied the dynamics of 1D rubidium-87 atomic gases after a sudden increase in the axial trapping potential. Normally, these dynamics would be difficult to describe theoretically, but the researchers found that a theory called generalized hydrodynamics captured the behavior of their 1D system over a long time evolution. —JS Recent theory captures the dynamics of one-dimensional rubidium-87 atomic gases after a quench. The dynamics of strongly interacting many-body quantum systems are notoriously complex and difficult to simulate. A recently proposed theory called generalized hydrodynamics (GHD) promises to efficiently accomplish such simulations for nearly integrable systems. We test GHD with bundles of ultracold one-dimensional (1D) Bose gases by performing large trap quenches in both the strong and intermediate coupling regimes. We find that theory and experiment agree well over dozens of trap oscillations, for average dimensionless coupling strengths that range from 0.3 to 9.3. Our results show that GHD can accurately describe the quantum dynamics of a 1D nearly integrable experimental system even when particle numbers are low and density changes are large and fast.