Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Entangled photon pairs from quantum dots embedded in a self-aligned
  cavity   We introduce a scalable photonic platform that enables efficient generation
of entangled photon pairs from a semiconductor quantum dot. Our system, which
is based on a self-aligned quantum dot-micro-cavity structure, erases the need
for complex steps of lithography and nanofabrication. We experimentally show
collection efficiency of 0.17 combined with a Purcell enhancement of up to 1.7
in the pair emission process. We harness the potential of our device to
generate photon pairs entangled in time bin, reaching a fidelity of 0.84(5)
with the maximally entangled state. The achieved pair collection efficiency is
4 times larger than the state-of-the art. The device, which theoretically
supports pair extraction efficiencies of nearly 0.5 is a promising candidate
for the implementation of bright sources of time-bin, polarization- and hyper
entangled photon pairs in a straightforward manner.

6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org