Richard Kueng

Huge thanks to Viet Tran, Mariami Gachechiladze and MVP Jan Noeller for a productive and fun collaboration!
Plus, a big shoutout to Sitan Chen, Weiyuan Gong and Qi Ye for developing elegant new frameworks for proving hardness of learning tasks which we managed to adapt to our needs.

In 2021, Robert Huang, myself & @preskill.bsky.social identified quantum state learning tasks that look hard, but become easy if you jointly process 2 copies. I have long wondered whether such challenges exist for c>2 copies. Turns out yes, there is an infinite hierarchy scirate.com/arxiv/2510.0...

Nobel Prize in Physics 2025 The Nobel Prize in Physics 2025 was awarded jointly to John Clarke, Michel H. Devoret and John M. Martinis "for the discovery of macroscopic quantum mechanical tunnelling and energy quantisation in an...

The pioneering work of Clarke, Devoret, and Martinis showed that very cold electrical circuits behave in ways that exhibit fundamental principles of quantum physics.
www.nobelprize.org/prizes/physi...

Something along the lines of a dual **q&q monarchy** perhaps? :-D (so many possibilities for puns)

🇦🇹🇭🇺 Austro-Hungarian reunion at the Hungarian Academy of Sciences. András Gilyén is probably one of the best quantum algorithm designers out there. He co-developed quantum SDPs, QSVT & Gibbs Sampling. No wonder he won an ERC! Happy that he also decided to return to Europe, and proud to be his friend!

Just had the pleasure to see this in person. Very impressive stuff, @andreasateth.bsky.social and team!

Those are going to be some big shoes to fill. If we can fill them at all...
I for one am extremely grateful for the advice and support Peter showed me when I started at JKU as a young assistant professor almost 5 years ago. Thank you, Peter!

way to go, Mario!

happy to see the proud quantum legacy of my homecountry 'tunnel' into unexpected application regimes. Go team 🇦🇹! :-D

me perhaps. greetings from Austria!

💡 Mit einer großen Delegation ist Bundespräsident Alexander Van der Bellen im Mai nach Japan gereist. Mit dabei: die JKU Linz mit ihrem Quantenforscher Richard Küng. Österreich und auch die JKU wird sich auf der EXPO in Osaka präsentieren. 🎌 http://go.jku.at/n25m1
📸 privat

Um den Einsatz der JKU Forscher*innen im Bereich Wissenschaftkommunikation zu würdigen, wurden die Kepler Awards ins Leben gerufen. Das Interesse war enorm: Es gab mehr als 90 Einreichungen, die sich in vielfältigen Initiativen engagieren. Wir gratulieren alle Gewinner*innen!🏆 http://go.jku.at/n25l7

Huge thanks to the team at the 'Knieambulanz' of UKH Linz -- in particular Dr. Daniel Hoefler -- for acting on this MRI data and excellently perform, in total, three surgeries to make my knee (almost) whole again!

YouTube video by Johannes Kepler Universität Linz Richard Küng: Quanten machen den Alltag wieder möglich | Quanten in deinem Alltag @ JKU Linz

A short info videoabout MRI imaging @jku.at which combines two of my favorite things: quantum technology ('spins') and math of imaging ('Fourier transforms'). It also made a very real difference for my personal life when I had nasty knee injuries:
www.youtube.com/watch?v=NBfb...

Den Quantenzirkus bändigen: Wie man einen Quantencomputer programmiert Wie entstehen Quantenalgorithmen, und was können sie? Der Quanteninformatiker Richard Küng über Unterschiede zu klassischen Bits und Gemeinsamkeiten mit dem Hütchenspiel

new article in @derstandard.at about how to program a quantum computer (in German):
www.derstandard.de/story/300000...

In the shadow of the Hadamard test: Using the garbage state for good and further modifications

scirate.com/arxiv/2505.1...

This work adds an unexpected twist to the Hadamard test by exploiting previously overlooked information.

www.quantumscience.at volunteered me to host my first proper workshop (~120 participants) at @jku.at. It really hits differently when you do not only welcome your peers at your academic institution, but also your hometown. We had a blast-furnace! @voestalpine.bsky.social steelfactory pun intended. 🇦🇹

What a great event -- thanks for organizing, @abgrilo.bsky.social. And thanks for recommending the lectures, including mine. This mean a lot coming from you!
Lecture notes for my part are also available here: www.jku.at/fileadmin/gr...

Last week I had fun teaching quantum complexity at the kaleidoscope research school at CIRM, Marseille 🇫🇷🥖: (conferences.cirm-math.fr/3225.html. Amazing location, great atmosphere and, finally, enough blackboard space for a lecture of yours truly! 😋
Lecture notes are here: www.jku.at/fileadmin/gr...

Four Tenure-track positions in AI exclusively for female applicants at @jkulinz.bsky.social! Details available soon at www.jku.at/en/lit-artif...

I can only agree. Great location, great people and great atmosphere throughout. Happy to have been a part of it!

great, that you are thinking along similar directions. Happy to discuss this project (perhaps after the TQC PC deadline 😅).

A reminiscing article about our quantum music project 'the sound of entanglement' made it into one of Austria's most reputable newspapers - @derstandard.at. More than 3000 people attended, a truly unbelievable experience. Huge thanks to the entire team and to @ya-oeaw.bsky.social for publishing it!

This is fantastic news, congratulations! Way to go, @mariokrenn.bsky.social. And well deserved, of course. 🍾

Astute observation, Mostafa. Boring reason: computational complexity is a mandatory course, while Quantum computing is an elective.

hi @rdvquantum.bsky.social! And thanks for reaching out -- this bluesky world is very new and exciting for me. Reminds me of the good old days on 'that other' short-message platform.

Last fall I taught two big classes on **computational complexity** (left selfie) and **quantum computing** (right selfie). We had a blast! Lecture notes are here: www.jku.at/fileadmin/gr..., www.jku.at/fileadmin/gr....
It was a lot of work, but now I am happy+proud to share them. Feedback welcome!

Thanks @zlatko-minev.bsky.social and hello bluesky world!