Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: PT-Symmetric Talbot Effects   We show that complex PT-symmetric photonic lattices can lead to a new class
of self-imaging Talbot effects. For this to occur, we find that the input field
pattern, has to respect specific periodicities which are dictated by the
symmetries of the system. While at the spontaneous PT-symmetry breaking point,
the image revivals occur at Talbot lengths governed by the characteristics of
the passive lattice, at the exact phase it depends on the gain and loss
parameter thus allowing one to control the imaging process.

6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: econ
25
The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph