IQOQI Vienna

Throwback to this year‘s Long Night of Research on April 24, where our brilliant scientists demonstrated just how fascinating the world of quantum physics can be ✨

🔬 New permanent exhibition "Science Changes" at TMW - Technisches Museum Wien

Step into the journey of discovery—where ideas become knowledge. Through historical objects and interactive stations, this exhibition invites you to explore how science really works.

✨ Don’t miss the highlight: a replica of Markus Aspelmeyer’s laboratory, giving you a hands-on look into the world of quantum physics research.



📸 TMW/Franzi Kreis

Happy World Quantum Day! 🌏✨

Today, we celebrate the incredible world of quantum physics and the ideas that have transformed our understanding of nature.

We’re excited to share a contribution from our Scientific & Deputy Executive Director, Prof. Caslav Brukner:
“Schrödinger’s Equation at 100: The Wave Picture That Helped and Possibly Hurt.”
https://schroedinger100.univie.ac.at/news/profs

Very cool to see our work highlighted in Der Standard 🎉
The article is based on our paper ‚Theory-independent monitoring of the decoherence of a superconducting qubit with generalized contextuality‘ in https://www.nature.com/articles/s41467-026-69030-x

Wie ein Qubit seine "magischen" Fähigkeiten verliert Wiener Physiker beobachteten quasi in Echtzeit, wie ein Quantensystem im Laufe der (sehr kurzen) Zeit zu klassischen physikalischen Eigenschaften zurückkehrt

14. April, 14:00 Uhr 🥳 👇

Neugierig auf Quantenforschung? Willkommen am IQOQI! Am 14. April ist „World Quantum Day“ – und eine gute Gelegenheit, Einblick in die Welt der Quanten zu bekommen. In Wien lädt das Institut für Quantenoptik und Quanteninformation (IQOQI) der ÖAW ein "Quantenluft" zu schnuppern.

Exciting news!
Our paper has been selected for the Physical Review Letters Collection 2025 – honored to be featured among this year’s highlights! 🎉
👉 https://promo.aps.org/prl2025

Entropic Costs of Extracting Classical Ticks from a Quantum Clock Experiments reveal the surprisingly large amount of entropy---and thus heat---generated by a clock that could be part of a quantum processor.

Our Director Markus Aspelmeyer took the stage at the 24th Einstein Lecture Dahlem, exploring one of the most intriguing questions in modern physics: “Quantum Physics and Gravity: How Does Schrödinger’s Cat’s Clock Tick?”



📷 Freie Universität Berlin | Max-Planck-Gesellschaft | Stefanie Loos

Quantum meets Vienna! 💫
On November 6, experts and the public came together at City Hall to celebrate Austria’s impact on global — hosted by Quantum Science Austria (quantA).
Find out more: https://www.iqoqi-vienna.at/detail/news/welcome-to-the-quantum-world

📸 Matthias Heisler

On October 31, the Slovak Academy of Sciences held a ceremonial event to honor Anton Zeilinger with the title of Doctor Honoris Causa for his achievements in the mathematical and physical sciences.


📸 Martin Bystriansky

Rainer Verch and Chris Fewster have received the 2024 Paul Ehrenfest Best Paper Award for foundations for their work ‘Quantum Fields and Local Measurements’!


For more details: https://www.iqoqi-vienna.at/news-events/ehrenfest-award/2024

New publication by our Scientific & Deputy Executive Director Caslav Brukner, Viktoria Kabel, Anne-Catherine de la Hamette and Samuel Fedida, exploring indefinite causal order between events in the context of quasiclassical spacetimes in superposition 👇

Knot invariants and indefinite causal order Samuel Fedida, Anne-Catherine de la Hamette, Viktoria Kabel, and Časlav Brukner, Quantum 9, 1875 (2025). We explore indefinite causal order between events in the context of quasiclassical spacetimes in superposition. We introduce several new quantifiers to measure the degree of indefiniteness o…