Quantum Internet — this has been in development and testing for a while now at Los Alamos and I am looking forward to it been expanded to the commercial sector. It has seen some challenges; however, every month we’re seeing the challenges knocked out such as the Quantum Light Source technology.
Imagine communicating with your bank, the IRS or your doctor by way of an Internet that was actually secure, where if any bad actor were to try to eavesdrop you would know immediately. Such is the promise of secure quantum communication, and has been since it was ‘almost ready’ starting in the 1990s.
For quantum communication to become the standard, technical challenges still lie ahead. To make progress toward devices that can send and receive quantum data, researchers at Stanford University have created a novel quantum light source.
The physics of quantum communication is admittedly complex. Standard lasers are actually not useful for secure communication because they emit what is called “classical” light. Data eavesdroppers could extract any data being carried via classical light without detection. In contrast, a quantum Internet would be based on “quantum” light, in which a single unit of light — a single photon — cannot be measured without being destroyed. Therefore, an efficient source of quantum light would enable perfectly secure communication.