Andreas Wallraff

🚀 We’re hiring! Join our team at the Quantum Device Lab at ETH Zurich as a Cleanroom Fabrication Engineer (100%, Zurich, fixed-term). Help us scale superconducting quantum processor chips incorporating 100+ qubits for fault-tolerant quantum computing! 🧵👇

What you’ll do: • Develop micro/nanofab processes (DRIE TSVs, thin films) • Boost chip yield & qubit coherence • Work across top cleanrooms: FIRST (ETH), BRNC (IBM), & PICO (PSI) Profile: MSc/PhD in nanofab, physics, EE, or materials + hands-on cleanroom background.

📍 Location: Zurich, Switzerland 🔗 Apply here: emea2.softfactors.com/job-opening/... Help us build next-gen quantum computers—apply today or repost to spread the word! 🔬✨ #QuantumComputing #ETHZurich

That is exciting. I got to know Pieter-Jan Derks at the IBM QEC summer school in Tarrytown some years ago. That school produced a lot of great researchers in QEC. Good luck with the startup. Maybe we can run some of your tools on our QEC hardware.

Walrus Computing@walruscomputing.bsky.social

Today, Walrus Computing is coming out of stealth. We’re on a mission to turn fault-tolerant quantum computers into engines of discovery. We build the software layer that makes them useful to anyone with a question worth asking.

23 Aug

Looking forward to be attending the Superconducting Qubits & Algorithms (SQA) 2026 conference in Gothenburg, Sweden from August 25 to 28. I will be giving an invited keynote talk on the opening evening and present new work on #quantum error correction from our lab.

23 Aug

Possibly, you get to see some new devices, such as the ones shown below, on this occasion. The work I will be presenting was done at the Quantum Device Lab (qudev.phys.ethz.ch) of the Department of Physics, @ethz.ch Zurich and at the ETH Zürich - PSI Quantum Computing Hub. and the Quantum Center.

sqa-conference.orgSuperconducting Qubits and Algorithms ConferenceThe Superconducting Qubits and Algorithms 2026 conference. Gothenburg, 25–28 August.

23 Aug

Want to learn more about the conference? Check out this web site: www.sqa-conference.org Are you attending as well?

19 June

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 Star Alliance members.

17 June

Having a great time at the UCLA #Quantum #Device Workshop with Mollie Schwartz, the internet sensation @zlatko-minev.bsky.social, and the UCLA bear. Check out the program here: qdc-qcsa.org/qdw/2026/info . It is never too late to learn more about quantum science with superconducting circuits.

14 June

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

14 June

Photo taken yesterday on my way to LAX through MUC.

13 June

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?

nytimes.comA Scientific Achievement That’s Totally Random

9 June

Check out this hot off the press article in the @nytimes.com on our work on #perfect #randomness : www.nytimes.com/2026/06/09/s... The work was done at Department of Physics, the #Quantum Center @ethz-qc.bsky.social , and @ethz.ch #Zürich ...

9 June

... by A. Kulikov, S. Storz, J. D. Schär, M. Sandfuchs, R. Wolf, F. Berterottière, C. Hellings, A. Wallraff & R. Renner.

5 June

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

I am optimistic that #Switzerland will win against #Finland tonight at the @iihf.bsky.social #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 IIHF Hockey World Championship. Go and win this!

Hopp Schwiiz! I think #Switzerland is moving on to the finals today in the @iihfhockey.bsky.social #hockey world championship semi-final game against Norway. The Swiss team is doing a great job and the atmosphere in the Arena in #Zurich is amazing with 10.000 supporters. Check out the video below.

I will be in the arena today for both the SUI-NOR and the CAN-FIN games. Say hello if you see me!

deutschlandfunk.dePerfekter Zufall: Quantenverschränkung liefert zertifizierbare Zufallszahlen

28 May

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

Are you in need of some certified #randomness? Check out our newest paper entitled "Experimental randomness amplification" which appeared in @nature.com today. www.nature.com/articles/s41...

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nature.comExperimental randomness amplification - NatureAn experimental realization of device-independent randomness amplification is demonstrated using superconducting qubits, in which a source of weak, correlated randomness is converted into virtually pe...

Check out the paper here: www.nature.com/articles/s41...

ethz.chPerfect randomness realised for the first timeResearchers at ETH Zurich have, for the first time, created certifiably perfect random numbers using a quantum experiment. These can be used, for instance, for encrypting messages.

or read more about it in the ETH Zürich press release: ethz.ch/en/news-and-...

Are you in need of some certified #randomness? Check out our newest paper entitled "Experimental randomness amplification" which appeared in @nature.com today. www.nature.com/articles/s41...

The work was done in a collaboration between the Renner and Wallraff groups at the Department of Physics of @ethz.ch Zürich and the Quantum Center @ethz-qc.bsky.social by A. Kulikov, S. Storz, J. D. Schär, M. Sandfuchs, R. Wolf, F. Berterottière, C. Hellings, @andreasateth.bsky.social & R. Renner.

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. (1/5)

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The authors are Yongxin Song, Johannes Knörzer, Kieran Dalton, @AndreasAtETH, Jean-Claude Besse. The work was done at the Quantum Device Lab of the Department of Physics, @ethz.ch, the Quantum Center, @ethz-qc.bsky.social , and the @ethz.ch - @psi.ch Quantum Computing Hub. (4/5)

The work was supported by State Secretariat for Education, Research and Innovation SERI and ETH Zürich. (5/5)

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. (2/5)

arxiv.orgBlind Quantum Computation on a Modular Superconducting ProcessorCurrent cloud-based quantum processors offer access to advanced hardware hosted on a remote server, but do not guarantee data or algorithm privacy. Blind quantum computation provides information-theor...

Check out our new paper "Blind Quantum Computation on a Modular Superconducting Processor" which appeared on @arxiv.bsky.social today as arXiv:2605.14656 (arxiv.org/abs/2605.14656). (3/5)

linkedin.com20 Papers from 20 Years of the Quantum Device Lab at ETH Zurich.Check out some of the highlight papers of our Quantum Device Lab at ETH Zürich from the past 20 years. I hope you will enjoy learning about our lab's work.

11 May

20 Papers from 20 Years of the Quantum Device Lab at ETH #Zurich @ethz.ch . www.linkedin.com/pulse/20-pap...

9 May

Full house for the 2026 #Quantum #Hackathon organized by the Quantum Engineering Commission at @ethz.ch #Zurich. With a welcome note 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/

5 May

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

5 May

Close up.

2 May

This year our Quantum Device Lab (qudev.phys.ethz.ch) has completed its first 20 years at the Department of Physics of @ethz.ch Zürich, since 6 years we are also part of the Quantum Center, @ethz-qc.bsky.social, and since 5 years we co-run the @ethz.ch Zürich - @psi.ch #Quantum Computing Hub. ...

linkedin.comThe First Twenty Years of the Quantum Device Lab at ETH Zurich - The ProfessorsThis year our Quantum Device Lab has completed its first 20 years at the Department of Physics (D-PHYS), ETH Zurich of ETH Zürich, since six years we are also part of the Quantum Center, ETH Zurich, a...

2 May

One of the aspects for the whole team to be proud of is the many successes of our current and former lab members. On the occasion of our lab's 20th anniversary, I give a shout out to former lab members who have moved on to graduate school, who now do postdocs, ...

2 May

... who started their own labs as faculty members, who have started companies, who have moved on to work in the quantum industry or in the tech industry. Today, I start with the professors. There are quite a few of them. Check out the article linked below. www.linkedin.com/pulse/first-...