Andreas Wallraff

Do you know how to combine #quantum and #classical (#conventional) neural networks in a #physics experiment? Check out our new paper "Hybrid Quantum-Classical Neural Networks for Recognizing Quantum Phases" which appeared on the @arxiv today: arxiv.org/abs/2606.28201 . The work was done in collaboration with the theory group of Hartmann Michael and Petr Zapletal form the @UniFAU Erlangen-Nürnberg. The experimental work at @ETH_physics, @ETHQuantumCntr, and @ETH_en was led by Colin Scarato, Johannes Knörzer, Markus K. Hoffmann, Leon C. Sander, Luca Hofele, Shengpu Wang, Kilian Hanke, Ashay Sathe, Dominic Hagmann, Alexander Flasby, Michael J. Hartmann, Petr Zapletal, Andreas Wallraff, and Christoph Hellings. Also, check out the complementary theory paper, which also appeared on the @arXiv today: arxiv.org/abs/2606.28199 .

Enjoying my 40 USD surcharge ‘window seat’ on my delayed @united flight from LAX to SFO. So no photos out of the window, I guess. Special service for @staralliance members.

Having a great time at the @UCLA #Quantum #Device Workshop with Mollie Schwartz (MIT Lincoln Laboratory), the internet sensation @zlatko_minev (@GoogleQuantumAI ), and the @UCLA bear. Check out the program of the workshop here: qdc-qcsa.org/qdw/2026/info . It is never too late to learn more about quantum science with superconducting circuits and its applications.

You are not a doctor, and maybe you have a PhD, and you need to do some surgery on your lattice to correct some gate errors quantumly: Here you can read how to do it. New paper out on @arxiv:2606.15190 [quant-ph] with the group of Markus Müller from @RWTH Aachen University and @fz_juelich entitled "Lattice surgery for near-term experimental logical qubit entanglement creation in planar architectures". Read more about it here: arxiv.org/abs/2606.15190 . The work was done by Lukas Bödeker, Áron Márton, Luis Colmenarez, PhD, Ilya Besedin, Andreas Wallraff, Markus Müller with work at @ETH Zürich supported by @IARPAnews, and @ETH_en Zürich.

Sunday quiz: Can you point at the @ETH_en #Zurich main building on this photo? Do you recognize anything else?

I am heading out to the #Quantum #Device #Workshop at @UCLA. Last year it was a super fun event. Looking forward to meet students and colleagues there. Find out more about the program and the other contributors here: qdc-qcsa.org/qdw/2026/info Will you be attending in person or online?

Check out this hot off the press article in the The New York Times on our work on #perfect #randomness : nytimes.com/2026/06/09/sci… The work was done at Department of Physics (@ETH_physics), the #Quantum Center @ETHQuantumCntr , and @ETH_en #Zürich by Anatoly Kulikov, Simon Storz, Josua D. Schär, Martin Sandfuchs, Ramona Wolf, Florence Berterottière, Christoph Hellings, Andreas Wallraff & Renato Renner.

Gooooood morning #Switzerland! It is snowing! Where am I?

#Microwave #Crosstalk in Planar Superconducting Quantum Devices is common in many multi-component integrated superconducting quantum circuits and limits their performance, whether the circuits are used for #quantum #computing or for #sensing. In this new paper out on @arxiv today, we identify three main cross-talk mechanisms prevalent in many planar device and verify their origin in dedicated experiments. Read more about our work here: arxiv.org/abs/2606.02440 and let us know if you have any questions or comments. The work was done at the Department of Physics (@ETH_physics), the Quantum Center (@ETHQuantumCntr), and the @ETH Zürich - @psich_en Paul Scherrer Institut Quantum Computing Hub by Yongxin Song, Dominic Hagmann, Kieran Dalton, Felix Henrich, Felix Wagner, Mohsen Bahrami Panah, Marek Pechal, and @AndreasAtETH. The work was supported by @IARPAnews, the @ETHFoundation1, and @ETH_en Zürich.

I am optimistic that #Switzerland will win against #Finland tonight at the @IIHFHockey #Hockey World Championship in #Zurich. If anything, it will be almost impossible to win against this crazy crowd of 10 thousand #Switzerland supporters in the very nice @swisslife Arena. Also because of them @swiss_hockey has not lost a single game in this tournament! Check out the video below and use any footage for yourself, if you like! Hopp Schwiiz! I am keeping my fingers crossed for the first win of the team #Switzerland at an @IIHFHockey World Championship. Go and win this!

Finale, ooooohhhhh

Hopp Schwiiz! I think #Switzerland is moving on to the finals today in the @IIHFHockey #hockey world championship semi-final game against Norway. The @swiss_hockey team is doing a great job and the atmosphere in the @swisslife Arena in #Zurich is amazing with 10.000 supporters. Check out the video below which I took at the SUI-GER match on Monday a week ago. I will be in the arena today for both the SUI-NOR and the CAN-FIN games. Say hello if you see me!

For all German speakers, here is 6 minute piece in @Deutschlandfunk, one of the big German radio stations, on our work on generating perfect random numbers using #quantum #physics. Check it out here: deutschlandfunk.de/perfekter-zufa…

Are you in need of some certified #randomness? Check out our newest paper entitled "Experimental randomness amplification" which appeared in @Nature today. The work was done in a collaboration between the Renner and Wallraff (@qudev) groups at the Department of Physics (@ETH_physics) of @ETH Zürich and the Quantum Center @ETHQuantumCntr by Anatoly Kulikov, @simonstorz, Josua D. Schär, Martin Sandfuchs, Ramona Wolf, Florence Berterottière, Christoph Hellings, @AndreasAtETH & Renato Renner. Check out the paper here: nature.com/articles/s4158… or read more about it in the ETH Zürich press release: ethz.ch/en/news-and-ev…

There are two exciting #faculty position opportunities at the Department of Physics (@ETH_physics) of @ETH Zürich that are looking to be filled at an open rank level, i.e. either as tenure track assistant professors, or as associate or full professor. Spread the word and forward this message to your #quantum connections. Successful candidates can look forward to move into a brand new building (ethz.ch/en/campus/deve…), make use of the great infrastructure (e.g. FIRST first.ethz.ch and BRNC brnc.ethz.ch) at ETH Zurich, be part of the Quantum Center, @ETHQuantumCntr, and get great students from the #Physics and Quantum Engineering Commission Master programs at ETHZ. Check out the two advertisements here: Professor or Assistant Professor (Tenure Track) of Experimental Condensed Matter Physics (official deadline May 28) ethz.ch/en/the-eth-zur… Professor or Assistant Professor (Tenure Track) of Next-Generation Electrical and Optical Devices (official deadline May 31st) ethz.ch/en/the-eth-zur… Both deadlines are near, but ETHZ also considers applications post deadline. Still it is good to have your application in as soon as possible for the best outcome. Check out the photo on which you see the ETHZ Hoenggerberg Campus home of Department of Physics (D-PHYS), ETH Zurich, the new HPQ building and the FIRST clean room

This will be exciting!

Do you wonder how you can execute a #quantum algorithm on a quantum server in a way that the operator of the server does know neither the task nor the result? Here we conceptually demonstrate blind quantum computing using two modules on a modular 3D integrated #superconducting #circuit. We also analyze the overhead incurred by doing the computation blindly. Such methods could be used in the future over larger distances using either microwave or optical interconnects. Check out our new paper "Blind Quantum Computation on a Modular Superconducting Processor" which appeared on @arxiv today as arXiv:2605.14656 (arxiv.org/abs/2605.14656). The authors are Yongxin Song, Johannes Knörzer, Kieran Dalton, @AndreasAtETH, @BesseJC. The work was done at the Quantum Device Lab of the Department of Physics (@ETH_physics), @ETH Zurich, the Quantum Center, @ETHQuantumCntr, and the @ETH_en Zürich - @psich_en Paul Scherrer Institut Quantum Computing Hub. The work was supported by State Secretariat for Education, Research and Innovation SERI and ETH Zürich.

20 Papers from 20 Years of the Quantum Device Lab (@qudev ) at @ETH_en #Zurich. linkedin.com/pulse/20-paper…

Full house for the 2026 @ETH_en #Quantum #Hackathon organized by the Quantum Engineering Commission (@AMIV_ETHZ) at @ETH Zürich. With a welcome note by @G_Dissertori the Rector of @ETH Zürich and by Manjari Sengupta the president of the Quantum #Engineering Commission Check out the program here: qec.amiv.ethz.ch/qhack26/ Looking forward to talk to many of the attendees today or during the weekend.

Close up.

What the heck is this colorful thing above lake #Zurich? Seen today.