Andreas Wallraff
@andreasateth.bsky.social
Research and education in physics with a focus on quantum computing, communication and sensing with team Qudev (https://qudev.phys.ethz.ch/) at ETH Zurich. Team lead at the ETHZ-PSI Quantum Computing Hub. Director of the Quantum Center at ETHZ.
Up for a race?
I hear top speed is 150 km/h if you know what you are doing!
I hear top speed is 150 km/h if you know what you are doing!
January 20, 2026 at 12:03 PM
Up for a race?
I hear top speed is 150 km/h if you know what you are doing!
I hear top speed is 150 km/h if you know what you are doing!
Gooooood moooorrrrnnnning from … Mönch, und Jungfrau.
Doing some skiing today.
Maybe participating in the Slalom race spontaneously.
Where am I?
Doing some skiing today.
Maybe participating in the Slalom race spontaneously.
Where am I?
January 18, 2026 at 7:57 AM
Gooooood moooorrrrnnnning from … Mönch, und Jungfrau.
Doing some skiing today.
Maybe participating in the Slalom race spontaneously.
Where am I?
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?
Do you recognize this place?
Any guesses on what I am here for?
January 9, 2026 at 12:49 PM
Goooooood moooorrrrning.
Do you recognize this place?
Any guesses on what I am here for?
Do you recognize this place?
Any guesses on what I am here for?
Bon appetit.
More food pics from my holiday cooking adventures.
More food pics from my holiday cooking adventures.
January 2, 2026 at 11:42 AM
Bon appetit.
More food pics from my holiday cooking adventures.
More food pics from my holiday cooking adventures.
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?
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?
December 31, 2025 at 10:50 AM
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?
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?
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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November 8, 2025 at 1:12 PM
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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November 8, 2025 at 1:12 PM
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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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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journal @physrevresearch.bsky.social 7, 043142 (2025).
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November 8, 2025 at 1:12 PM
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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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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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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November 8, 2025 at 1:12 PM
... 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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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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November 8, 2025 at 1:12 PM
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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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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October 4, 2025 at 3:18 PM
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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Read more here in this @PhysRevLett 125, 260502 (2020): journals.aps.org/prl/abstract... .
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October 4, 2025 at 3:18 PM
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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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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October 4, 2025 at 3:18 PM
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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This is a beautiful place!
Do you know where this is?
And what I am here for?
Do you know where this is?
And what I am here for?
September 23, 2025 at 4:21 PM
This is a beautiful place!
Do you know where this is?
And what I am here for?
Do you know where this is?
And what I am here for?
... 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.
and much more ...
The page will continue to be updated throughout the next weeks.
September 14, 2025 at 6:59 PM
... 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.
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 ...
With an updated list of publications: qudev.phys.ethz.ch/publications ...
September 14, 2025 at 6:59 PM
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 ...
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.
August 30, 2025 at 2:32 PM
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,
August 30, 2025 at 2:32 PM
... 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 ...
August 30, 2025 at 2:32 PM
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 ...
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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August 21, 2025 at 8:47 PM
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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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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August 21, 2025 at 8:47 PM
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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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?
Are there any experts on superconducting circuits out here to confirm or deny?
August 14, 2025 at 1:28 AM
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?
Are there any experts on superconducting circuits out here to confirm or deny?