Alexander Schuckert

Alexander Schuckert

@schuckert.org

Quantum Computing Faculty @ ENS Paris & CNRS. Editor at Quantum Journal. schuckert.org

171 followers 101 following142 posts

Alexander Schuckert

Very impressive. Two orders of magnitude better than Google’s best at 7e-4. Reduction of logical error rate of 12x per distance increase by two is very high - Google’s result is 2.1x. Note however long syndrome extraction round of 200ms, which may improve in grid architecture.

Ross Duncan@rossquantum.bsky.social

#quantinuum QEC team absolutely killing it right now. Here's the latest results showing logical error rate down to 5x10^-6 with the colour code. On the Helios hardware. Get stuck in! #quantumcomputing #qec #quantum arxiv.org/abs/2610.24077

arxiv.orgQuantum error correction well below the color code thresholdQuantum error correction enables scalable fault-tolerant quantum computation by suppressing logical errors exponentially with code distance once physical error rates fall below a critical threshold. H...

Alexander Schuckert reposted

@physicsworld.bsky.social

The particle-physics process of string breaking has been modelled on a trapped ion quantum computer 🧪⚛️ ow.ly/g6vU50ZX5gf

ow.lyGluon string breaking is simulated using trapped ions – Physics WorldQuantum simulation goes beyond traditional models

Alexander Schuckert

Aye.

Aaron Roth@aaroth.bsky.social

AI tools are very useful for mathematical research. But at present, producing good work requires a labor intensive step that I have been calling "deslopping" - making the thing readable. Please do not skip this step; even if the theorem is great an unreadable paper is worthless.

Alexander Schuckert

There has been talk about restricting access to quantum computers because "malicious users" could use it to crack cryptography. We show that this is (probably) not necessary: we construct a computational model in which quantum simulations are allowed but factoring isn't. arxiv.org/abs/2610.06812

arxiv.orgProtecting Quantum Computers against Untrusted UsersPublicly accessible fault-tolerant quantum computers must preserve scientific utility while limiting cryptanalytic power. We propose the restricted model of computation, 1/2BQP_1: a quantum server pro...

Alexander Schuckert

There are many open questions about this scheme. The most important one is how much larger we can make the class of quantum simulations without giving access to factoring. We argue that our access model contains the complexity class DQC1, but give some arguments for why we believe it is larger.

Alexander Schuckert

There has been talk about restricting access to quantum computers because "malicious users" could use it to crack cryptography. We show that this is (probably) not necessary: we construct a computational model in which quantum simulations are allowed but factoring isn't. arxiv.org/abs/2610.06812

arxiv.orgProtecting Quantum Computers against Untrusted UsersPublicly accessible fault-tolerant quantum computers must preserve scientific utility while limiting cryptanalytic power. We propose the restricted model of computation, 1/2BQP_1: a quantum server pro...

Alexander Schuckert

The idea is to run the user circuit on a random input string, which is only revealed after the computation together with all measurements. We argue this blocks factoring while keeping some quantum simulations, e.g. infinite-temperature correlations which includes NMR spectra, spin transport.

Alexander Schuckert

Another long-held belief in QEC shattered. We live in a fun time. Congrats @vva.bsky.social! arxiv.org/abs/2610.06730

arxiv.orgQubit CSS codes with Universal Transversal GatesThe Eastin-Knill theorem rules out a universal set of transversal logical gates on any code that detects single-qubit errors. The theorem constrains one partition of the qubits at a time. We show that...

Alexander Schuckert

Interesting perspective on how important writing is for examining students. I certainly agree that one can judge someone‘s understanding way better in a conversation than a text. www.nytimes.com/2026/09/29/o...

nytimes.comOpinion | I’m a College Professor. Writing Isn’t as Important as We Think. (Gift Article)If I do not treat writing as essential for achieving thought, it is not clear why I should force my students to.

Alexander Schuckert

Based in London and interested in a "bridge postdoc" on quantum computing? We have a position available as part of our collaboration with Google to run quantum-many-body simulations on their willow chip, starting ASAP. www.jobs.ac.uk/job/DSJ367/p...

jobs.ac.ukPostdoctoral Research Associate in Quantum Many-Body Systems at King's College LondonSearching for an academic job? Explore this Postdoctoral Research Associate in Quantum Many-Body Systems opening on jobs.ac.uk! Click to view more details and browse other academic jobs.

Alexander Schuckert

This might mean that post-quantum cryptography is not post-quantum, at least not some of the current leading candidates considered by NIST eprint.iacr.org/2026/1591

Alexander Schuckert

Same is true for female scientists in male-dominated areas. I have seen them consistently needing to outperform male peers to get the same credit or opportunities.

Athena Kugblenu@athenakugblenu.bsky.social

The Guardian once asked me 'what one change would you make to achieve Black equality in Britain?' and it feels appropriate to share my answer again

Alexander Schuckert

I have PhD and postdoc positions available to join my group at ENS Paris, centered on designing algorithms for quantum computers in the early fault-tolerant era and sitting at the interface of theory and experiment. One position starts already in the fall of this year!

Alexander Schuckert

In particular, one postdoc position is available starting in autumn '26 (yes, that's this year) for 2+1 years.

Alexander Schuckert

I have PhD and postdoc positions available to join my group at ENS Paris, centered on designing algorithms for quantum computers in the early fault-tolerant era and sitting at the interface of theory and experiment. One position starts already in the fall of this year!

Alexander Schuckert

I am looking for candidates with an excellent track record in quantum computing, quantum simulation, quantum error correction or a closely related area, and with the ambition to work on a technically demanding direction at the frontier of the field.

Alexander Schuckert

I have PhD and postdoc positions available to join my group at ENS Paris, centered on designing algorithms for quantum computers in the early fault-tolerant era and sitting at the interface of theory and experiment. One position starts already in the fall of this year!

Alexander Schuckert

Members of my group work closely with experiments in academia (Max Planck Institute of Quantum Optics, Duke, Cornell) and industry (particularly QuEra, Google and Quantinuum).

Alexander Schuckert

I have PhD and postdoc positions available to join my group at ENS Paris, centered on designing algorithms for quantum computers in the early fault-tolerant era and sitting at the interface of theory and experiment. One position starts already in the fall of this year!

Alexander Schuckert

The group is closely integrated into a network of researchers between Paris, Munich, Madrid (digianaqsim.eu) whose goal is to incorporate digital methods into analog quantum simulators.

Alexander Schuckert

This is one of the most useful tools for writing notes with AI. No more fake citations! Thank you, Shannon! github.com/Shannon-Whit...

github.comGitHub - Shannon-Whitlock/VeraCite: A lightweight, auditable tool for checking the accuracy and conformity of BibTeX/biblatex bibliographies in scientific articlesA lightweight, auditable tool for checking the accuracy and conformity of BibTeX/biblatex bibliographies in scientific articles - Shannon-Whitlock/VeraCite

Alexander Schuckert

Tesla VP of AI frustrated with public not understanding Taylor expansions: “Growth in robotaxi miles driven is literally exponential. Just it's in the early part of the exponential. "…Yes, you can call any linear growth exponential, just with a small exponent.

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

Note that if you get one of these grants, it is quite easy to get more funding from national funding agencies as it is the most prestigious 'seal of excellence' in Europe.

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

A PhD student/postdoc typically costs around 70k/100k Euros per year (including overheads) in western European countries. Typical PhD duration is 4 years, so these grants fund ~10 PhD students!

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

In the collaborative Synergy grant, a team of 2-4 PIs can ask for up to 14M Euros over 6 years.

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

You can ask for 3.5M, 4, 4.5 M Euros over up to 5 years if you are <7 years (starting), <12 year (consolidator), >12 years (advanced) after your PhD. These are not collaborative grants, that's money that only goes to your group.

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

Advanced and plus grants are "lump sum", meaning you can freely redistribute what you spend the money on after you get the grant.

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

After you get the grant, you can use it as a bargaining chip to negotiate a professorship as you can move the grant to a different university.

Alexander Schuckert

To all US colleagues: the ERC has doubled the amount of additional funding researchers relocating from outside Europe. These grants can fund ~10 4-year PhD students and often lead to national "add-on" grants. New also: the 7 M Euro, 7 year "Plus" grant for exceptional visionaries. More 👇

Alexander Schuckert

You do not need to be a PI already to apply, this is the most major opportunity for postdocs to start their own group in Europe. You just need to find a university that would host you (which is not hard, everyone loves to have ERC grantees).

Alexander Schuckert

Things that didn't need a study to know they're true...

Nature@nature.com

A biology journal trialled paying their reviewers and found it led to faster first editorial decisions – and increased review quality. go.nature.com/446SaLu

go.nature.comWhy paying peer reviewers works, according to a journal’s editor-in-chiefA biology journal which paid peer reviewers found that the approach cut the time to a first editorial decision by 85% and maintained high-quality reviews.

Alexander Schuckert

Someone sent me an email about their negative view on the post-Shor world in a poetic homage to T. S. Eliot that I just had to share: Welcome to the prospect of a horrifying new world with fear in a handful of particulate dust to send us fleeing into the night.

Alexander Schuckert

One of the most cherished influences of AI on my work is the blessing of error and warning-free latex documents. Gives me a kick every time I see this symbol in overleaf without orange or red.

Alexander Schuckert

I always liked the interpretation of the "we" as the authors together with the reader. In that interpretation, even a single author can write "we".

Wikipedia@wikipedia.org

Take a moment to appreciate this article ~context-free~ before learning who this is. 🧵⬇️ (1/4)

Alexander Schuckert

The relevant measure of qubit coherence is the delay time that keeps fidelity above 99.9% - that's what Maciej Malinowski proposes in this note. I think this makes a lot of sense! T2 is dead, long live T3! m-malinowski.github.io/2025/09/07/q...

Alexander Schuckert

The time to switch to post-quantum is now. Advances in both algorithms and hardware have been mind-boggling in the last couple of months - @bsi.bund.de's "End of 2030" recommendation for a switch seems highly risky. @signal.org's PQC protocol shows how to switch without removing classical safety.

Sabine Hossenfelder@hossenfelder.bsky.social

I used to think that quantum computing's threat for bitcoin is a far-fetched worry (and not my problem anyway) but I have recently changed my mind. www.youtube.com/watch?v=rjYF...

youtube.comWill Quantum Computing Kill Bitcoin?YouTube video by Sabine Hossenfelder

Alexander Schuckert

Super happy to be part of this amazing initiative. Scientific publishing how it should be - community-led, open-access and donation-funded. We're always looking for motivated editor colleagues!

Nicolai Friis@improbabilitydrive.bsky.social

10 years after its founding, driven by the energy, enthusiasm, & dedication of the community @quantum-journal.bsky.social quietly published paper #2000 some days ago. At least I think this is a big deal, big shout out to the founders & all authors, reviewers, editors, board members & contributors!

Alexander Schuckert

This is a pretty accurate description of what it’s like to do a postdoc in science - without the silicon valley pay. Everyone agrees this must change, but no-one seriously touches the part that actually could (yes, I am looking at you, faculty hiring committees) www.theguardian.com/technology/n...

theguardian.com12-hour days, no weekends: the anxiety driving AI’s brutal work culture is a warning for all of usSan Francisco’s AI startups are pushing workers to grind endlessly, hinting at pressures soon hitting other sectors

Alexander Schuckert reposted

Deutsche Physikalische Gesellschaft e. V.

@dpgphysik.bsky.social

👩‍🔬Unsere Physikerin der Woche ist Prof. Dr. Annabelle Bohrdt! Annabelle ist theoretische Physikerin an der Ludwig-Maximilians-Universität München. Erfahre mehr über Annabelle & ihre Forschung: www.dpg-physik.de/vereinigunge...

Alexander Schuckert reposted

@martinmbauer.bsky.social

Really interesting event that would require black holes thatcan't be produced via any conventional mechanism!

Christopher Berry@cplberry.bsky.social

Oo! Interesting #GravitationalWave candidate #S251112cm potentially from a *subsolar* mass source If real, the source is probably has chirp mass ~0.1–0.87 solar masses False alarm rate 1 in 6.2 yr GraceDB gracedb.ligo.org/superevents/... GCN gcn.nasa.gov/circulars/42... Rating 📏🍬 [🧪🔭⚛️]

Alexander Schuckert

Another reason to not pay 13k to publish with a „professional“ publisher - use community-driven journals such as Quantum or SciPost Physics instead.

Tamás Kriváchy@krivachytamas.bsky.social

5️⃣/🔟 In Scientific Reports, 5 of the top 10 most cited articles have an article number of 1. 5️⃣/🔟 In Nature Communications the same: 5 of the top 10 are article 1s. Coincidence? 👇 scirate.com/arxiv/2511.0... I think not.

Alexander Schuckert reposted

Université PSL

@psl-univ.bsky.social

📢 Call for applications: PSL PhD Tracks | Shaping the future of research Highly selective and entirely taught in English, #PSLPhDTracks are 5-year fully funded programs intended for high-potential students hoping to become top level researchers, in France or abroad. Info 👉 psl.eu/en/education...

Alexander Schuckert reposted

Victor V. Albert

@vva.bsky.social

QuICS Hartree fellowship application is out! A competitive and completely free-range postdoc. Anyone interested in quantum science and technology topics is encouraged to apply, preferably by Dec. 1. umd.wd1.myworkdayjobs.com/en-US/UMCP/j...

umd.wd1.myworkdayjobs.comQuICS Hartree Postdoctoral FellowJob Description Summary The Joint Center for Quantum Information and Computer Science (QuICS, http://quics.umd.edu) is seeking exceptional candidates for the QuICS Hartree Postdoctoral Fellowships in ...

Alexander Schuckert

One of the best places in the world to do a PhD in quantum - I did mine with this fellowship and it was awesome! Apart from great environment in Munich, lots of opportunities to mingle with other quantum centers in the world in summer schools, workshops etc.

Juan José García-Ripoll@jjgarciaripoll.bsky.social

The International Max Planck Research School for Quantum Science and Technology (IMPRS-QST) and the Munich Quantum Valley (MQV) announced the open call for several fully funded PhD fellowships starting from Fall 2026. application.imprs-quantum.mpg.de/public/

application.imprs-quantum.mpg.deIMPRS-QST - Index

Alexander Schuckert

So much agree. The actual peer review happens after publication anyway.

Matti Vuorre@matti.vuorre.com

Against Publishing: universonline.nl/nieuws/2025/... Preprints are read, shared, and cited, yet still dismissed as incomplete until blessed by a publisher. I argue that the true measure of scholarship lies in open exchange, not in the industry’s gatekeeping of what counts as published.

Alexander Schuckert reposted

@quantumearl.bsky.social

Coming out of social media hibernation to ask: Are you interested in hosting a future QEC conf? We are looking for detailed bids for QEC27 over the next month (provisional deadline 21st November). For more info: DM or email me. QEC26 will be in Santa Barbara

Alexander Schuckert

I held this fellowship and loved it! QuICS and JQI are dream places to do postdoc research, the promised freedom of the Fellowship is not just a paper tiger here like in many other places.

Victor V. Albert@vva.bsky.social

2025 UMD Quantum postdoc job thread. We start with the Quantum Optics Fellowship, intended for AMO and QI. Anyone who would have applied for the JQI Fellowship should apply to this one. academicjobsonline.org/ajo/fellowsh...

academicjobsonline.orgUniversity of Maryland, Joint Quantum Institute/Joint Center for Quantum Information and Computer Science Job #AJO30633, University of Maryland Theoretical Quantum Optics Fellowship, Joint Quantum Institute/Joint Center for Quantum Information and Computer Science, University of Maryland, College Park, ...

Alexander Schuckert reposted

@scurry.bsky.social

Replying to @scurry.bsky.social

I am so dismayed a the statement today from the President of the @royalsociety.org that I want to publish here the letter I wrote to him yesterday urging him to address the clear concerns of the UK scientific community.

Alexander Schuckert

There should be no misunderstanding that this is utter and complete corporate BS. No quantum computers are needed for whatever they did in this work. It's a shame to see IBM depart from their fact-based approach. See Scott Aaronson's blog post: scottaaronson.blog?p=9170

Financial Times@financialtimes.com

HSBC claims quantum trading breakthrough on.ft.com/4mDbeYG

on.ft.comHSBC claims quantum trading breakthroughEurope’s largest lender tested a tool developed by IBM on bond market data

Alexander Schuckert

When you realize the whole yearly budget for Quantum journal is equal to 8 Nature APCs - and they don't even wreck your paper in proof stage because...there is none

Alexander Schuckert reposted

Francesco Arzani

@frarzani.bsky.social

Looking for a postdoc to work on bosonic quantum error correction! Join me and the QAT team at ENS & INRIA Paris — flexible start date. Details here 👉 recrutement.inria.fr/public/class... or feel free to reach out!

recrutement.inria.frPost-Doctoral Research Visit F/M Senior postdoctoral researcher in bosonic quantum error correctionOffre d'emploi Inria

Alexander Schuckert

Just donated to this, is a true archive containing irreplaceable scientific “soft” knowledge

Bob Coecke@coecke.bsky.social

Nobel Prize Laureate Roger Penrose, Yvette Fuentes, and myself, request your help in order to save an archive of incredible scientific and historical value. Please raise awareness by *sharing*, or *contribute*: www.crowdfunder.co.uk/p/roger-penr...

crowdfunder.co.ukRoger Penrose & Friends Appeal for Unique ArchiveTo digitise and restore the worlds largest collection of audio and visual recordings within the scientific community, spanning over 50 years

Alexander Schuckert

Interesting precedent of Science retracting a paper solely based on the fact that interpretations were likely overclaiming, but without scientific misconduct. A bit torn about this, it’s difficult to draw the line and really, that’s the job of the referees go.nature.com/44MQsQI

go.nature.comControversial ‘arsenic life’ paper retracted after 15 years — but authors fight backThe journal Science retracts a headline-grabbing study, but the authors vigorously defend their data and say the retraction is unwarranted.

Alexander Schuckert

Just wrote a little script that extracts your availability in a certain time frame from a google calendar: schuckert.medium.com/extract-your...

schuckert.medium.comExtract your availability from your Google calendarDid you ever want a script that extracts the available times in a certain time window from your Google Calendar? Look no further!