Generalized hydrodynamics in strongly interacting 1D Bose gases
Generalized hydrodynamics in strongly interacting 1D Bose gases
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DOI：
10.1126/science.abf0147
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发表时间：
2020-09
期刊：
影响因子：
56.9
通讯作者：
N. Malvania;Yicheng Zhang;Yuan Le;J. Dubail;M. Rigol;D. Weiss
中科院分区：
文献类型：
--
作者：
N. Malvania;Yicheng Zhang;Yuan Le;J. Dubail;M. Rigol;D. Weiss
描述量子在超速原子质中可以简化相互作用的粒子的尺寸，从而简化其降低。描述理论上，研究人员发现，一种称为广义的流体动力学在长期演变中捕获了其1D系统的行为。几乎可以进行的系统，我们通过在强和中间耦合方面进行大量的陷阱，我们发现该理论和实验在数十个陷阱振荡器上，对于量子振荡，我们的量子量几乎是0.3。当粒子时数字是低的，密度变化很大且快速。
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.