Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ghost Imaging of Dark Particles   We propose a new way to use optical tools from quantum imaging and quantum
communication to search for physics beyond the standard model. Spontaneous
parametric down conversion (SPDC) is a commonly used source of entangled
photons in which pump photons convert to a signal-idler pair. We propose to
search for "dark SPDC" (dSPDC) events in which a new dark sector particle
replaces the idler. Though it does not interact, the presence of a dark
particle can be inferred by the properties of the signal photon. Examples of
dark states include axion-like-particles and dark photons. We show that the
presence of an optical medium opens the phase space of the down-conversion
process, or decay, which would be forbidden in vacuum. Search schemes are
proposed which employ optical imaging and/or spectroscopy of the signal
photons. The signal rates in our proposal scales with the second power of the
feeble coupling to new physics, as opposed to light-shining-through-wall
experiments whose signal scales with coupling to the fourth. We analyze the
characteristics of optical media needed to enhance dSPDC and estimate the rate.
A bench-top demonstration of a high resolution ghost imaging measurement is
performed employing a Skipper-CCD to demonstrate its utility in a dSPDC search.

33
The categories of this paper are: plasm-ph
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat