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With the help of a new experiment, researchers at LiU, have succeeded in confirming a ten-year-old theoretical study, which connects the complementarity principle with information theory.

So-called quantum encryption will ensure the security of sensitive information – but this new technology has to be tested outside the lab environment. LiU is therefore taking part in a project studying secure communication channels of the future.

Digital information exchange can be safer, cheaper and more environmentally friendly with the help of a new type of random number generator for encryption developed at LiU. The technology paves the way for a new type of quantum communication.

An optical circuit capable of ensuring the security of quantum cryptography. The idea that researchers Alvaro Alarcón and Guilherme B. Xavier had five years ago has now been tested and could pave the way for the future of secure communication.

“We have seen increasing interest from students for quantum computers, quantum cryptography and photonics, says Jan-Åke Larsson, who has taken the initiative to a new profile within Applied Physics and Electrical Engineering.

3,283 people in Sweden, among them pupils at Katedralskolan in Linköping, participated in a huge experiment that challenged Einstein’s ideas about how the world works on the scale of quantum mechanics. The results have now been published in Nature.

Senior lecturer Guilherme Xavier founded a laboratory of quantum technologies at LiU in 2018. His research group’s new results could make help quantum communication over long distances more robust.

The Swedish Research Council has awarded SEK 1.4 million to SECRET, a European collaborative project to increase security in quantum communication. The project, with a budget of EUR 340,000, will be coordinated by LiU researcher Guilherme Xavier.

A quantum mechanical random generator that functions with high security has been developed by a research group in which LiU researcher Guilherme Xavier is a member. The result opens the way for high-dimensional quantum communication.