= Single particle double slit experiment
This experiment seems to be really hard to do, and so there aren't many super clear demonstration videos with full experimental setup description out there unfortunately.
Wikipedia has a good summary at: https://en.wikipedia.org/wiki/Double-slit_experiment\#Overview
For single-<photon> non-<double-slit experiments> see: <single photon production and detection experiments>. Those are basically a pre-requisite to this.
<photon> experiments:
* https://aapt.scitation.org/doi/full/10.1119/1.4955173 "Video recording true single-photon double-slit interference" by Aspden and Padgetta (2016). Abstract says using <spontaneous parametric down-conversion> detection of the second photon to know when to turn the camera on
<electron> experiments: <single electron double slit experiment>.
Non-<elementary particle>:
* 2019-10-08: 25,000 Daltons
* https://interactive.quantumnano.at/letsgo/ awesome interactive demo that allows you to control many parameters on a lab. Written in Flash unfortunately, in 2015... what a lack of future proofing!
\Video[https://www.youtube.com/watch?v=GzbKb59my3U]
{title=Single Photon Interference by <Veritasium> (2013)}
{description=Claims to do exactly what we want, but does not describe the setup precisely well enough. Notably, does not justify how he knows that single photons are being produced.}