Yeah, in olden times sure. You can say a big paper like EPR paradox one, was written as only three people. These days, a lot of people would jump on a big paper since citations is the currency of research now.
To be honest, this seems very sus to me. A big paper with only three authors?! I went down the rabbit hole of trying to find the lab from which it has been published. It’s almost there is no online presence. In another paper they put out along with it, they say that they show Meissner effect (levitating effect of a superconductor) and that a video is attached. I looked for the video but I wasn’t able to find it. :/
Have you… seen the… figures?!! Also, the Arxiv listing had a spelling mistake. “First” was spelled as “firs”.
Error 404: experience not found.
P.S. happened with me too ;)