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Ross Duncan

@rossquantum.bsky.social

Quantum computing lifer. ZX-calculus co-inventor. Quantum compiler compiler and quantum programmer programmer. String diagrammer. Category theoriser. Senior Fellow @ Quantinuum (I cannot read DMs on Bluesky)

673 Followers  |  385 Following  |  210 Posts  |  Joined: 08.03.2024  |  2.0451

Latest posts by rossquantum.bsky.social on Bluesky

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Minimising the number of edges in LC-equivalent graph states Hemant Sharma, Kenneth Goodenough, Johannes Borregaard, Filip RozpΔ™dek, and Jonas Helsen, Quantum 10, 2001 (2026). Graph states are a powerful class of entangled states with numerous applications in...

Newly published in Quantum: Minimising the number of edges in LC-equivalent graph states by Hemant Sharma, Kenneth Goodenough, Johannes Borregaard, Filip RozpΔ™dek, and Jonas Helsen doi.org/10.22331/q-2...

10.02.2026 14:30 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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maybe anathem got it right, idk.

17.12.2025 22:33 β€” πŸ‘ 23    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0

Very cool.

05.02.2026 05:12 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

$ tail -1 /etc/hosts
127.0.0.1 www.washingtonpost.com

05.02.2026 05:10 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
talks.cam : Automatically Formally Verified Hardware using Aristotle

I am giving a talk about automatic formal verification of computer hardware using Harmonic's Aristotle system at the University of Cambridge at their CS department on Thursday 26 February 2026 at 2PM in room FW26. The talk is open to the public.
talks.cam.ac.uk/talk/index/2...

29.01.2026 20:00 β€” πŸ‘ 26    πŸ” 6    πŸ’¬ 3    πŸ“Œ 0

want to escape serfdom? time’s running out to start piping your entire workflow through a Clasp stack hosted on a Worgret instance and then sieving that output into LiBit bottles to get churned up into something Fluss can read and tokenize in the cloud with Nonk

29.01.2026 01:10 β€” πŸ‘ 44    πŸ” 12    πŸ’¬ 2    πŸ“Œ 0

Slow Horses is great, miles better than everything else on Apple TV. Also, each season is self contained (because based on a book) so there's no narrative rip off at the end, like pretty much much all other contemporary shows. Caveat given, Severance is good, Silo OK.

29.01.2026 14:00 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Our first ZX-calculus paper was written in 2007 in the Alborz mountains in Iran. Let's hope that the Iranian people can get what "they" want. (RIP Hassan)

www.cs.ox.ac.uk/people/bob.c...

12.01.2026 22:46 β€” πŸ‘ 12    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

I would be amazed if the Szilard point had not been passed at a national level decades ago, at least in the UK.

07.01.2026 12:20 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
39C3 - AI Agent, AI Spy
YouTube video by media.ccc.de 39C3 - AI Agent, AI Spy

Not a lot of surprises for people following closely, but a pretty good summary of where AI-OS is in 2026.
www.youtube.com/watch?v=0ANE...

07.01.2026 07:33 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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More on whether useful quantum computing is β€œimminent” These days, the most common question I get goes something like this: A decade ago, you told people that scalable quantum computing wasn’t imminent. Now, though, you claim it plausibly is immi…

I almost missed this from Scott Aaronson:

> Meanwhile, Quantinuum took a victory lap, boasting of their recent successes in a way that I considered basically justified.

scottaaronson.blog?p=9425

cc: @quantinuum.bsky.social

05.01.2026 12:39 β€” πŸ‘ 5    πŸ” 1    πŸ’¬ 1    πŸ“Œ 0

subscribe to 404 Media if you want to see a few people do the news half a year before corporate media reports it

05.01.2026 22:11 β€” πŸ‘ 468    πŸ” 72    πŸ’¬ 2    πŸ“Œ 1

They're going to *throw out* one-of-a-kind NASA archives?!

Not even a year since the Inauguration & we're already at the 2nd-time-as-farce version of the burning of the Library of Alexandria.

31.12.2025 19:55 β€” πŸ‘ 2988    πŸ” 1593    πŸ’¬ 87    πŸ“Œ 121

Interesting article, especially the part about big companies.

31.12.2025 04:37 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This is horrific. AI hallucinates references, Google Scholar swallows them, libraries adapt their records to Google Scholar as ground truth, and an inexistent paper becomes reality.

21.12.2025 14:57 β€” πŸ‘ 12    πŸ” 1    πŸ’¬ 1    πŸ“Œ 2

Enough of this finite initial segment nonsense. A number is even if there is no remainder when divided by 2. \Aleph_0 = 2 \Aleph_0, so by cardinality, there is an even number of naturals *and* an even number of integers. And even if there was one more, that would still be an even number!

17.12.2025 00:33 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

Or "outwith"

16.12.2025 23:53 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

If I were a journal editor I would do the prompt injection myself, in order to detect AI reviewers.

16.12.2025 23:35 β€” πŸ‘ 8    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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More than half of researchers now use AI for peer review β€” often against guidance A survey of 1,600 academics found that more than 50% have used artificial-intelligence tools while peer reviewing manuscripts.

Just decline the peer review invitation.

What are you people even doing?

16.12.2025 22:39 β€” πŸ‘ 657    πŸ” 196    πŸ’¬ 34    πŸ“Œ 29
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Context Widows or, of GPUs, LPUs, and Goal Displacement

Scientists should read this.
artificialbureaucracy.substack.com/p/context-wi...

16.12.2025 06:09 β€” πŸ‘ 9    πŸ” 3    πŸ’¬ 0    πŸ“Œ 1

Definitely interested!

15.12.2025 13:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I'm not going to Q2B -- where can I see more? Is it open source?

15.12.2025 01:03 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Kathrin Spendier leads a multimillion-dollar quantum competition

In search of better work–life balance, @spendier.bsky.social gave up her job as a tenured physics professor and looked for jobs in industry. The transition required repackaging her skills. She now runs @xprize.org’s competition in quantum applications. #whatcanphysicistsdo

26.11.2025 15:17 β€” πŸ‘ 3    πŸ” 4    πŸ’¬ 0    πŸ“Œ 0
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can't stop watching this clip of a tesla Optimus teleoperator taking his headset off before properly logging out the robot

08.12.2025 09:29 β€” πŸ‘ 27986    πŸ” 7590    πŸ’¬ 372    πŸ“Œ 1112
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ERC-Plus: jackpot science or missed chance to fix academia? My reflections on ERC-Plus, Europe’s newest ultra-competitive research grant and what it tells us about the academic culture we’re…

I just published: ERC-Plus: jackpot science or missed chance to fix academia?

My reflections on ERC-Plus, Europe’s newest ultra-competitive research grant and what it tells us about the academic culture we’re building.

medium.com/p/erc-plus-j...

03.12.2025 11:42 β€” πŸ‘ 100    πŸ” 62    πŸ’¬ 6    πŸ“Œ 12
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Microsoft Virtual Events Powered by Teams Microsoft Virtual Events Powered by Teams

Want to hear more about #quantinuum's Helios #quantum computer? There's a webinar. It's on Teams, Tuesday 11 December, twice!.
-- 3pm GMT / 9am MT events.teams.microsoft.com/event/37fe2b...
-- 11pm GMT / 4pm MT events.teams.microsoft.com/event/35bd82...

02.12.2025 23:10 β€” πŸ‘ 4    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
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Since the community here is very familiar with VQAs and their pitfalls, Here's my 2 cents on the the topic, would love to hear what everyone thinks too.
TLDR: "VQAs are doomed, and that's great news for QC"

1/ however long it's gonna take

28.11.2025 13:23 β€” πŸ‘ 9    πŸ” 2    πŸ’¬ 1    πŸ“Œ 1
Jimmy Cliff  - Vietnam  -
YouTube video by Vacacion08 Jimmy Cliff - Vietnam -

RIP Jimmy Cliff.
www.youtube.com/watch?v=OChr...

25.11.2025 04:55 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Post image 17.08.2025 16:38 β€” πŸ‘ 1713    πŸ” 505    πŸ’¬ 11    πŸ“Œ 25
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Covid inquiry live: β€˜Inexcusable’ delays under Johnson led to 23,000 deaths Lockdowns may have been avoided if Boris Johnson’s government had acted faster, damning report finds

Having Johnson & Cummings in Downing Street when Covid struck was, just like Brexit, an entirely avoidable disaster caused largely by utterly appalling journalism. And now exactly the same clowns, arses & bigots with bylines are rolling out the red carpet for Farage.
www.thetimes.com/article/1b15...

20.11.2025 17:14 β€” πŸ‘ 4015    πŸ” 1414    πŸ’¬ 165    πŸ“Œ 77

@rossquantum is following 20 prominent accounts