Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized hydrodynamics in strongly interacting 1D Bose gases   The dynamics of strongly interacting many-body quantum systems are
notoriously complex and difficult to simulate. A new theory, generalized
hydrodynamics (GHD), promises to efficiently accomplish such simulations for
nearly-integrable systems. It predicts the evolution of the distribution of
rapidities, which are the momenta of the quasiparticles in integrable systems.
GHD was recently tested experimentally for weakly interacting atoms, but its
applicability to strongly interacting systems has not been experimentally
established. Here we test GHD with bundles of one-dimensional (1D) Bose gases
by performing large trap quenches in both the strong and intermediate coupling
regimes. We measure the evolving distribution of rapidities, and 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. By also measuring
momentum distributions, we gain experimental access to the interaction energy
and thus to how the quasiparticles themselves evolve. The accuracy of GHD
demonstrated here confirms its wide applicability to the simulation of
nearly-integrable quantum dynamical systems. Future experimental studies are
needed to explore GHD in spin chains, as well as the crossover between GHD and
regular hydrodynamics in the presence of stronger integrability breaking
perturbations.

16
The categories of this paper are: stat
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg