Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing bulk topological invariants using leaky photonic lattices   Topological invariants characterising filled Bloch bands attract enormous
interest, underpinning electronic topological insulators and analogous
artificial lattices for Bose-Einstein condensates, photons, and acoustic waves.
In the latter bosonic systems there is no Fermi exclusion principle to enforce
uniform band filling, which makes measurement of their bulk topological
invariants challenging. Here we show how to achieve controllable filling of
bosonic bands using leaky photonic lattices. Leaky photonic lattices host
transitions between bound and radiative modes at a critical energy, which plays
a role analogous to the electronic Fermi level. Tuning this effective Fermi
level into a band gap results in disorder-robust dynamical quantization of bulk
topological invariants such as the Chern number. Our findings establish leaky
lattices as a novel and highly flexible platform for exploring topological and
non-Hermitian wave physics.

31
The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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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: atom-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph