Building quantum curiosity and capability

Today is World Quantum Day. The date, 14 April was chosen because 4.14 is the rounded number representing Planck’s constant (symbol h). This is a fundamental measure devised by the father of quantum theory, Nobel prize-winning physicist, Max Planck in 1900.

We care about it because it’s in use today to define the kilogram and other standard weights and measures. Quantum technologies enable precise measurement, giving us a whole new level of expertise in precision navigation, timing and sensing.

According to Planck's theory, different atoms and molecules emit or absorb energy in discrete quantities. The constant defines the quantum nature of energy and relates the energy of a photon (a particle of light) to its frequency. It is essential for understanding the motion of atoms and subatomic particles that happen in modern electronics and quantum mechanics.

The control and movement of particles lies at the heart of other quantum technologies as well. These include quantum computing, quantum networking, quantum communication and quantum materials. Photonic and quantum technologies such as computer chips, global positioning systems (GPS), atomic clocks, laser scanners and smartphones drive today’s global economy.

At Te Whai Ao — Dodd-Walls Centre we’re home to internationally recognised researchers in photonic and quantum technologies. Curious about the interaction of light and matter, we’re exploring fundamental questions and enabling better communication, computing and sensing. Our unique strength lies in our people, whose skills range from theoretical science to translation for commercial use. Our mission is to advance globally distinctive research to future-proof critical capabilities and infrastructure for Aotearoa's economy and well-being.

We wish you a Happy World Quantum Day and encourage you to visit New Zealand’s website for the International Year of Quantum Science and Technology as well as the world site which marks today and every day in 2025.

‍