We have the first image ever of photons in an entangled state. You may read the actual paper at the Science Advances page.
Of course, you can't tell that there is any entanglement going on just by looking at the image shown. You have to read the entire thing to see why there is a clear violation of Bell-type inequality here, or more specifically, the CHSH inequality that was meaning measured.
Neat stuff!
Zz.
