Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Floquet second-order topological insulators in non-Hermitian systems   Second-order topological insulator (SOTI) is featured with the presence of
$(d-2)$-dimensional boundary states in $d$-dimension systems. The
non-Hermiticity induced breakdown of bulk-boundary correspondence (BBC) and the
periodic driving on systems generally obscure the description of non-Hermitian
SOTI. To prompt the applications of SOTIs, we explore the role of periodic
driving in controllably creating exotic non-Hermitian SOTIs both for 2D and 3D
systems. A scheme to retrieve the BBC and a complete description to SOTIs via
the bulk topology of such nonequilibrium systems are proposed. It is found that
rich exotic non-Hermitian SOTIs with a widely tunable number of 2D corner
states and 3D hinge states and a coexistence of the first- and second-order
topological insulators are induced by the periodic driving. Enriching the
family of topological phases, our result may inspire the exploration to apply
SOTIs via tuning the number of corner/hinge states by the periodic driving.

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The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph