Information Coding (ICG)

Improved quantum cryptography with optical circuit

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.

AI-generated image with a robot attempting to write the word security.

How can AI be made secure and used to create safety?

Recently, a full-day seminar on AI and Security was held at Linköping University. The seminar was organized by SWECA in collaboration with Linköping University, the County Administrative Board of Östergötland, and The Swedish Police Authority.

ELLIIT Joint Autonomous Systems Lab in Linköping and Lund showcasing autonomous robot.

The University Board on Study Visit to Visionen

In December 2023, the university board visited the Department of Electrical Engineering (ISY). In the research arena Visionen, examples were presented highlighting Linköping University's crucial role in technological and societal development.

Quantum communication tested on a large scale

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.

Two persons in a lab with a laserinstrument infront of them on a table full of cables.

Better cybersecurity with new material

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.

This gives advantages to quantum algorithms

Listen to Professor Jan-Åke Larssons talk at the Cavendish Quantum Information Seminar Series, on what gives advantages to quantum algorithms.

Two pioneers awarded LiU University Service Medals

LiU has awarded University Service Medals for 2022 to Robert Forchheimer and Karin Fält-Magnusson. The award-winners this year are two emeritus/emerita professors who have meant a great deal for LiU in their respective field.

Nobel Prize awarded for evidence of entangled particles

The Nobel Prize for Physics, 2022, has been awarded to three researchers, for their research into quantum phenomena. Jan-Åke Larsson, professor at LiU, has made theoretical contributions to experiments led by Anton Zeilinger in Vienna.

Successful premiere for ISY's PhD Workshop

For the first time the Department of Electrical Engineering organized an all-day conference dedicated solely to the department's PhD-students. Afterwards the director of PhD studies, Mark Vesterbacka, was more than satisfied when he summed up the day

Alvaro Alarcón, Joakim Argillander and Guilherme B Xavier in the lab at LiU.

A more robust quantum communication

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.

Picture of an optical fibre launching light in a photonic integrated silicon chip at the quantum technologies laboratory at LiU.

Major progress towards high-dimensional quantum communication

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.

Quantum computers and photonics to attract students

“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.

Swedish Research Council grant for secure quantum communication

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.

Spreading light over quantum computers

Scientists at Linköping University have managed to simulate quantum computer properties in a classical computer. “Our results should be highly significant in determining how to build quantum computers”, says Professor Jan-Åke Larsson.

The results of the Big Bell Test are in

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.

Hacking the unhackable

Jonathan Jogenfors’ doctoral thesis discusses security in what many people consider to be the most secure system of all – quantum cryptography. And it explains how to fix the holes he found.

Organic electronics can use power from socket

Organic light-emitting devices and printed electronics can be connected to a socket in the wall by way of a small, inexpensive organic converter, developed in a collaboration between Linköping University and Umeå University.

Bell-testet samlade drygt 109 000 deltagare

109,000 Bell test participants

Can atoms talk to each other? This is the question posed by Swedish radio programme “Vetandets värld”, after the BIG Bell test collected no less than 95 million ones and zeros from more than 109,000 participants, 3,283 of them in Sweden.

Jan-Åke Larsson, professor i informationskodning

The Big Bell Test

The experiment of the century is to be repeated, but this time using people as random number generators and at the same time in many places around the world. It will now be decided once and for all whether Albert Einstein or Niels Bohr was right.

LiU-researchers reveal security hole

Quantum cryptography is considered a fully secure encryption method, but researchers from LiU and Stockholm University have discovered that this is not always the case.

'Spooky action at a distance' exists

Jan-Åke Larsson, professor of information coding at LiU, is part of the research group that proved that what Albert Einstein dismissed as ‘spooky action at a distance’ actually exists. “This is the experiment of the century,” he says.

Woman and man with headsets and green military clothing in front of computer. More screens in the background.

A LiU master’s programme to fight cybercrime

Companies and society in general are increasingly targeted by cybercrime. Experts are needed to ensure protection. There are several good reasons for LiU to establish a master’s programme in cybersecurity, starting in the autumn of 2023.