Italian nationalism in the sciences fascinates me.
The final results of this experiment were publicly demonstrated on 24 June 2011 on Piazza San Marco, Venice, in the presence of the international press, experts, well-known personalities and the general public. In the style of Guglielmo Marconi, we realized this first public demonstration of radio vortices by also involving ordinary people in the experiment—a different way to communicate science. A light and sound show with projections onto the fa¸cade of Palazzo Ducale explained to the audience what the experimenters were doing. More than 2000 people attended the ‘live’ experiment at 21:30 local time and when the signal was tuned from vorticity zero to vorticity one at the same frequency and transmitting simultaneously, a rifle shot was heard, in honour of the first radio transmission made by Guglielmo Marconi in 1895. After this, on the facade of Palazzo Ducale the words ‘segnale ricevuto’, which in Italian means ‘signal received’, were projected.
And frightens me a little - how can I give this result any credence now that I have read this?
Encoding many channels on the same frequency through radio vorticity: first experimental test
"We have shown experimentally, in a real-world setting, that it is possible to use two beams of incoherent radio waves, transmitted on the same frequency but encoded in two different orbital angular momentum states, to simultaneously transmit two independent radio channels. This novel radio technique allows the implementation of, in principle, an infinite number of channels in a given, fixed bandwidth, even without using polarization, multiport or dense coding techniques. This paves the way for innovative techniques in radio science and entirely new paradigms in radio communication protocols that might offer a solution to the problem of radio-band congestion."
"Moreover, our experimental findings demonstrate that the spatial phase signature was preserved even in the far-field region and for incoherent non-monochromatic wave beams. These results open up new perspectives not only for wireless communication but also for physics and astronomy, including the possible detection of Kerr black holes in the test general relativity"
This looks too good to be true, but I cannot see any obvious issues, and they have an experimental confirmation.
If this pans out, it would be a black swan in the making for many of the wireless spectrum allocation/licensing authorities and companies.