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Generalized hydrodynamics in strongly interacting 1D Bose gases

Neel MalvaniaDepartment of Physics, The Pennsylvania State University, University Park, PA 16802, USAYicheng ZhangDepartment of Physics, The Pennsylvania State University, University Park, PA 16802, USAYuan LeDepartment of Physics, The Pennsylvania State University, University Park, PA 16802, USAJérôme DubailUniversité de Lorraine, CNRS, LPCT, F-54000 Nancy, FranceMarcos RigolDepartment of Physics, The Pennsylvania State University, University Park, PA 16802, USADavid S. WeissDepartment of Physics, The Pennsylvania State University, University Park, PA 16802, USA

2021en

ABI

Annotatsiya

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.

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DOI: 10.1126/science.abf0147

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