Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Minimal non-abelian nodal braiding in ideal metamaterials   Exploring new topological phases and phenomena has become a vital topic in
condensed matter physics and material sciences. It is generally believed that a
pair of band nodes with opposite topological charges will annihilate after
collision. Recent studies reveal that a braided colliding nodal pair can be
stabilized in a multi-gap system with PT or C_2z T symmetry. Beyond the
conventional single-gap abelian band topology, this intriguing phenomenon
exemplifies non-abelian topological charges. Here, we construct ideal acoustic
metamaterials to realize non-abelian braiding with the fewest band nodes. We
experimentally observe an elegant but nontrivial nodal braiding process,
including nodes creation, braiding, collision, and repulsion (i.e., failure to
annihilate), and measure the mirror eigenvalues to elucidate the essential
braiding consequence. The latter, at the level of wavefunctions, is of prime
importance since the braiding physics essentially aims to entangle multi-band
wavefunctions. Furthermore, we experimentally unveil the highly intricate
correspondence between the edge responses and the bulk non-abelian charges.
Notably, all our experimental data perfectly reproduce our numerical
simulations. Our findings pave the way for developing non-abelian topological
physics that is still in its infancy.

5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
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The categories of this paper are: astro-ph