University libraries

Imagine a world where your messages, banking transactions or medical data are protected by the fundamental laws of quantum physics, and not just by digital codes. This is the promise of quantum cryptography, a revolution in the making thanks to photonic qubits.
A photonic qubit is the basic unit of quantum information, carried by a particle of light: the photon. Unlike conventional bits (0 or 1), a qubit can be in several states at once, opening the door to ultra-high-performance calculations, but above all to unbreakable communications. Quantum cryptography exploits these properties to create tamper-proof communication systems, where the mere observation of a message by an eavesdropper alters it, immediately alerting both sender and receiver.
Why is this important ? With the rise of quantum computers, current encryption methods could become obsolete. Quantum cryptography offers a solution for securing our data in the quantum age.
On the program for our Science infuse workshop: What is a photonic qubit (with short experiments)? How does quantum cryptography work? What are the practical applications?

Lecture by Kuntheak Kheng, Professor of Physics at Grenoble Alpes University, head of the NanoSciences and Nanotechnologies specialization, and a specialist in semiconductor physics and nanostructures.