Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced stability, bistability, and exceptional points in saturable
  active photonic couplers   A generic photonic coupler with active and lossy parts, gain saturation and
asymmetric characteristics is examined. Saturable activity is shown to be able
to enhance the overall stability of the steady states, prevent evolution to
undesirable unbounded modes and allow for bistable operation in specific
regions of parametric space. Both stability and bistability are studied in the
phase space of the system, where the basins of attraction of each state are
identified, providing an accurate description of the dependence of the electric
fields on the initial conditions. Continuous families of exceptional points are
detected via suitable regulation of the coupling and asymmetry features of the
configuration. In this way, a complete description of the nonlinear dynamics
landscape is provided, which should be crucial for multiple application-driven
designs incorporating such a ubiquitous optical component.

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The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin