Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Floquet engineering topological Dirac bands   We experimentally realized a time-periodically modulated 1D lattice for
ultracold atoms featuring a pair of linear bands, each associated with a
Floquet winding number: a topological invariant. These bands are spin-momentum
locked and almost perfectly linear everywhere in the Brillouin zone (BZ),
making this system a near-ideal realization of the 1D Dirac Hamiltonian. We
characterized the Floquet winding number using a form of quantum state
tomography, covering the BZ and following the micromotion through one Floquet
period. Lastly, we altered the modulation timing to lift the topological
protection, opening a gap at the Dirac point that grew in proportion to the
deviation from the topological configuration.

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The categories of this paper are: funct-an
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
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The categories of this paper are: ao-sci