Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Breakdown of quantisation in a Hubbard-Thouless pump   The fate of topological transport in the strongly correlated regime raises
fundamental questions on the role of geometry in quantum many-body physics.
Recently, different platforms have emerged as possible probes for many-body
transport beyond the traditional Hall response; these include ultracold quantum
gases, Rydberg atoms, and photonics. A paradigm of quantised transport is the
topological Thouless pump, which represents the one-dimensional, dynamic
analogue of the quantum Hall effect. A few experiments have explored the
effects of interactions on Thouless pumping in two-body and optical mean-field
systems, but the strongly correlated regime has so far remained out of reach.
Here, we experimentally detect the breakdown of topological transport due to
strong Hubbard interactions in a fermionic Thouless pump, facilitated by a
dynamical optical superlattice. We observe the deviation from quantised pumping
for repulsive Hubbard $U$, which we attribute to pinned atoms in a Mott
insulator. On the attractive side another mechanism is reducing the pumping
efficiency: a smaller energy gap for pair pumping makes the evolution less
adiabatic. The dynamical superlattice operated at a single frequency
establishes a novel platform for studying topology in the presence of strong
correlations in one, two, and possibly three dimensions, including avenues to
fractional transport.

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The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
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The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci