In this way, they will work for create a high-security communication infrastructure in Spain, while supporting the european quantum industry and promote a new industrial sector with new companies in the digital and cybersecurity field.
Although this communication is becoming a more real option, its opportunities have been explored for many years. In June 2017, Chinese scientists reported that they had completed a transmission of entangled photons between suborbital space and Earth.
In this investigation, between the satellite in orbit and the ground stations there were between 500 and 2 thousand kilometers of distance. To make it work, a laser beam on the satellite was subjected to a beam splitter, which gave two different polarized states. One of them was used for the transmission of entangled photons and the other for the reception of photons, overcoming distances of more than a thousand kilometers, which also represents a record.