#UZH:
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UZH-Detektor sucht nach sehr leichter Dunkler Materie im Universum
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"Supraleitende Sensoren können einzelne Photonen mit niedriger Energie detektieren. UZH-Forschende haben diese Fähigkeit nun genutzt, um nach sehr leichten Dunkle-Materie-Teilchen zu suchen."
9.9.2025
https://www.news.uzh.ch/de/articles/media/2025/Dunkle-Materie.html
#Astronomie #Astrophysik #DarkMatter #DM #DunkleMaterie #Kosmologie #matter #Nanodraht #QROCODILE #SNSPD #Supraleitung #Universum #Zürich
Recently, two groups published exciting results using free-space optical links for #QuantumCommunication with #SNSPD technology. In one paper, the authors report on a study of the effect of atmospheric turbulence on finite-size decoy-state BB84 quantum key distribution (#QKD). In another collaboration, the team demonstrated a QKD system designed for full daylight operation at 1550 nm. Learn more: https://ilphotonics.com/practical-free-space-qkd-enabled-by-snspds/
@tom30519
I'd naively think that some dispersion may be tolerable/desirable to compensate for pointing inaccuracies, as long as a single photon (the more, the merrier) can find its way to the receiver. The instrument that does most of the magic is the superconducting nanowire single photon detector (#SNSPD).
Here is a detailed description of the system that I found (tl;dr yet):
PDF: https://dataverse.jpl.nasa.gov/api/access/datafile/74661
👀 "Superconducting single-photon detectors get hot"
