Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robust unidirectional transport in a one-dimensional metacrystal with
  long-range hopping   In two- and three-dimensional structures, topologically-protected chiral edge
modes offer a powerful mean to realize robust light transport. However, little
attention has been paid so far to robust one-way transport in one-dimensional
systems. Here it is shown that unidirectional transport, which is immune to
disorder and backscattering, can occur in certain one-dimensional metacrystals
with long-range hopping without resorting to topological protection. Such
metacrystals are described by an effective Hermitian Hamiltonian with broken
time reversal symmetry, and transport does not require adiabatic (Thouless)
pumping. A simple implementation in optics of such one-dimensional
metacrystals, based on transverse light dynamics in a self-imaging optical
cavity with phase gratings, is suggested

17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs