Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unveiling the Enhancement of Spontaneous Emission at Exceptional Points   Exceptional points (EPs), singularities of non-Hermitian physics where
complex spectral resonances degenerate, are one of the most exotic features of
nonequilibrium open systems with unique properties. For instance, the emission
rate of quantum emitters placed near resonators with EPs is enhanced (compared
to the free-space emission rate) by a factor that scales quadratically with the
resonance quality factor. Here, we verify the theory of spontaneous emission at
EPs by measuring photoluminescence from photonic-crystal slabs that are
embedded with a high-quantum-yield active material. While our experimental
results verify the theoretically predicted enhancement, it also highlights the
practical limitations on the enhancement due to material loss. Our designed
structures can be used in applications that require enhanced and controlled
emission, such as quantum sensing and imaging.

26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio