Efforts to develop powerful quantum computers and quantum simulators are ongoing, with a parallel program focused on creating the quantum equivalent of the classical internet.
The existing telecommunication network is a leading candidate for the future quantum internet infrastructure, offering a widespread channel for light to travel long distances with minimal absorption. Light, due to its low absorption and high speed, is an ideal carrier of information, whether classical or quantum.
While bright laser light can easily transfer classical information on the internet, quantum communication, which involves quantum bits encoded in single photons, requires more advanced methods. Unlike classical networks, quantum bits cannot be amplified using traditional light amplifiers without damaging the information contained in the photons. Therefore, a new technology is needed to build a quantum version of the internet: the quantum repeater.
Just as light amplifiers ensure connectivity between distant locations, quantum repeaters will enable long-distance communication by distributing entanglement between them.
2024-04-02 23:51:03
Original from phys.org
