Andreas Wallraff

Great start for #Switzerland 🇨🇭 into the #Olympics !

Reaching 150 km/h is challenging. You probably fall at lower speeds than that and then slow down significantly.

I doubt it.

EM&J

Up for a race?
I hear top speed is 150 km/h if you know what you are doing!

What about a warm-up drink?

Update!

Gooooood moooorrrrnnnning from … Mönch, und Jungfrau.
Doing some skiing today.
Maybe participating in the Slalom race spontaneously.
Where am I?

Goooooood moooorrrrning.
Do you recognize this place?
Any guesses on what I am here for?

Bon appetit.
More food pics from my holiday cooking adventures.

We are grateful to ETH Zürich, the @ethfoundation.bsky.social , the State Secretariat for Education, Research and Innovation @sbfi.admin.ch, Innosuisse, the Swiss National Science Foundation @snsf.ch, and IARPA for their support of our research.
Also, visit our lab's website: qudev.phys.ethz.ch

Our research is done at Department of Physics ( @ethz.ch physics ), @ethz.ch Zurich, the @ethz-qc.bsky.social Quantum ETH Zurich, and the @ethz.ch Zürich - @psich.bsky.social Paul Scherrer Institut #Quantum #Computing Hub.

Thanks to all members of our lab for their contributions to the lab's research and education in #quantum #science and #technology this year. Curious about our publications? Follow this link qudev.phys.ethz.ch/publications .

YouTube video by Quantum Device Lab Quantum Device Lab: 2025 The Year In Review

Check out our Quantum Device Lab's 2025 The Year in Review video below.
Let us know if you like it.
youtu.be/Oo4cSzxpvds?...

Got back to doing some cooking over the holidays!

These are meat balls with a spicy tomato-pepperoni-ginger sauce which turned out very nice.

I have not posted any food pics in a while!
Are you still into it?

We do not have a special name as far as I can tell. I will ask and let you know.

Francois Swiadek, Christian Kraglund Andersen (now professor @tudelft @qutech.bsky.social), Christopher Eichler (now professor FAU Erlangen), @andreasateth.bsky.social supported by IARPA, the @snsf.ch Swiss National Science Foundation, and the @ethfoundation.bsky.social.

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The work was done by Christoph Hellings, Nathan Lacroix (now at Google), Ants Remm (now at @atlanticquantum.bsky.social), Richard Boell, Johannes Herrmann (now at YQuantum), Stefania Lazar (now at Zurich Instruments), Sebastian Krinner (now at Zurich Instruments) ...

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Calibrating Magnetic Flux Control in Superconducting Circuits by Compensating Distortions on Time Scales from Nanoseconds up to Tens of Microseconds Fast tuning of the transition frequency of superconducting qubits using magnetic flux is essential, for example, for realizing high-fidelity two-qubit gates with low leakage or for reducing errors in ...

The paper is also available on arXiv here: arxiv.org/abs/2503.04610

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Read more here: journals.aps.org/prresearch/a...

In this paper we document the methods which we use at the #Quantum Device Lab (@ethz-qc.bsky.social @ethz.ch Zurich, Department of Physics (D-PHYS), and at the @ethz.ch - @psich.bsky.social #Quantum #Computing Hub.

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Check out our newest paper "Calibrating magnetic flux control in superconducting circuits by compensating distortions on timescales from nanoseconds up to tens of microseconds" published in the @apsphysics.bsky.social
journal @physrevresearch.bsky.social 7, 043142 (2025).

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... control the qubit transition frequency on time scales ranging from nano- to microseconds.

Also make sure that there are no bias-tees in your circuit that have a non-linearity, observable as a power-dependence of the response function, which may hamper your efforts.

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Do you find it challenging to accurately control the transition frequency of your superconducting #qubit by applying magnetic flux? Frequently, the frequency dependence of the response function of the electronics, the wiring, and the flux-bias circuitry must be compensated for to accurately ..
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Mihai Gabureac (now at PSI Paul Scherrer Institut), Kevin Reuer, Kadir AKIN (now at PSI Paul Scherrer Institut) , Baptiste Royer, Alexandre Blais, and Andreas Wallraff.
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The work was done by Paul Magnard (now founder of Isentroniq), Simon Storz (now postdoc at Department of Physics (D-PHYS), ETH Zurich), Philipp Kurpiers (now at Rohde & Schwarz), Josua Schär, Fabian Marxer (now at IQM Quantum Computers), Janis Lütolf, Theo Walter, JC Besse,
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This was a major achievement which enabled a range of experiments at our lab (qudev.phys.ethz.ch/publications) and also elsewhere.
Read more here in this @PhysRevLett 125, 260502 (2020): journals.aps.org/prl/abstract... .
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Five years ago at the @qudev Lab of ETH Zürich we have reported on the first realization of a "Microwave #Quantum Link between Superconducting Circuits Housed in Spatially Separated Cryogenic Systems" coupling #qubits across a distance of 5 meters through a #microwave waveguide.
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Well done!

This is a beautiful place!
Do you know where this is?
And what I am here for?

A lot more research and development needs to be done to have large scale fault-tolerant quantum computers to become a reality. Small quantum computers, with all the functionality exist though to try out concepts and develop algorithms also for quantum error correction.