Andreas Wallraff

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.

Our lab is part of the Quantum Center, @ethz.ch Zurich, the Department of Physics (D-PHYS), ETH Zurich, and the ETH Zürich - @psich.bsky.social Paul Scherrer Institut Quantum Computing Hub.

... A list of current lab members, including the new ones for this term: qudev.phys.ethz.ch/members
and much more ...
The page will continue to be updated throughout the next weeks.

Just in time for the start of the new fall term 2025, our Quantum Device Lab's new and improved web site is available. Go and check it out here: qudev.phys.ethz.ch
With an updated list of publications: qudev.phys.ethz.ch/publications ...

The work was supported by State Secretariat for Education, Research and Innovation SERI, by Innosuisse, IARPA, by the Swiss National Science Foundation @snsf.ch, the @ethfoundation.bsky.social, and @ethz.ch Zürich.

... at the Department of Physics (D-PHYS), ETH Zurich, the Quantum Center, ETH Zurich and the @ethz.ch Zürich— @psich.bsky.social Paul Scherrer Institut #Quantum Computing Hub,

The paper was authored by Song Yongxin,, Liberto Beltrán, Ilya Besedin, Michael Kerschbaum, Marek Pechal, François Swiadek, Christoph Hellings, Dante Colao Zanuz, Alexander Flasby, Jean-Claude Besse, and Andreas Wallraff ...

New paper from our lab on Realizing a constant-depth fan-out with real-time feedforward on a superconducting quantum processor out as Phys. Rev. Applied 24, 024068 – Published 28 August, 2025.
Read more about it here: journals.aps.org/prapplied/ab...

Looks like I will be taking an appropriate mode of transportation for a #quantum physicist on my flight from #IAD to #ZRH tonight.
Do you know who is advertizing this?

Circuit quantum electrodynamics This review surveys the development over the last 15 years of circuit quantum electrodynamics, the nonlinear quantum optics of microwave electrical circuits. In analogy to cavity quantum electrodynami...

journals.aps.org/rmp/abstract...

Alexandre Blais (UdSherbrooke Université de Sherbrooke), Arne Grimsmo (Amazon Web Services (AWS)), Steven Girvin (@yaleqi.bsky.social), Andreas Wallraff (@ethz.ch)

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Follow this link to read the article: journals.aps.org/rmp/abstract... and let us know what you find particularly useful and which parts could be improved or extended.

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Looks like our Circuit Quantum Electrodynamics (or short Circuit QED) Review (@apsphysics.bsky.social American Physical Society, Rev. Mod. Phys. 93, 025005 – Published 19 May, 2021) got the first 2000 citations. At least that is what Google Scholar claims.

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Done.

Insider!

I think I took a photo of a two-level defect, also known as a TLS, at the QEC25 conference on #quantum error correction at Yale and @yaleqi.bsky.social today.
Are there any experts on superconducting circuits out here to confirm or deny?