Every December since 2017, I've delivered a keynote at Q2B Silicon Valley, commenting on recent progress in quantum computing. Here is what I said this time. It's been a good year for quantum. quantumfrontiers.com/2025/12/26/q...

🤦 This is why the public doesn’t trust scientists...

OpenAI leadership are promoting a paper in Physics Letters B where GPT-5 proposed the main idea — possibly the first peer-reviewed paper where an LLM generated the core contribution. One small problem: GPT-5's idea tests the wrong thing. My technical comment: scirate.com/arxiv/2512.0... 1/

"A single person claims to have authored 113 academic papers on artificial intelligence this year, 89 of which will be presented this week at one of the world’s leading conference on AI and machine learning," www.theguardian.com/technology/2...

We are in the era of Science Slop! (and it's exciting): open.substack.com/pub/superpos...

Great article on quadratic gravity, and why researchers are attracted to it (it's renormalisable). The pure gravity action of postquantum-classical gravity is the same us that of quadratic gravity but with a different interpretation, and it doesn't suffer from ghosts! arxiv.org/abs/2402.17844 ⚛️🧪

The #QIP2026 list of accepted papers is out! qip2026.lu.lv/programme/ac... highlighting some of the important papers in quantum computing in the past year. This is a fantastic slice from a very rich landscape. Congratulations to the authors! ⚛️🧪

A recent @nature.com article claims that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglement, it would be mediated by the quantised matter interaction, and not gravity. scirate.com/arxiv/2511.0... 🧪⚛️

We'll enjoy it while it lasts!

Another day, another arxiv paper claiming that classical gravity can produce entanglement. Last week's Nature paper continues to cause confusion. But classical fields can't create entanglement *even if* they directly couple two masses. Comment added at superposer.substack.com/p/no-classic...

As promised... No, classical spacetime can’t produce entanglement. I can create entanglement by turning a knob on a laser, but the knob isn't mediating entanglement. Is the knob "producing" the entanglement? This week's Nature paper is causing confusion! superposer.substack.com/p/no-classic... 🧪⚛️

As promised... No, classical spacetime can’t produce entanglement. I can create entanglement by turning a knob on a laser, but the knob isn't mediating entanglement. Is the knob "producing" the entanglement? This week's Nature paper is causing confusion! superposer.substack.com/p/no-classic... 🧪⚛️

No they do not. I'll try to write something up in the next few days....

What if the measurement problem isn't about explaining how the classical world emerges from the quantum world... ...but about what happens when quantum systems interact with something that's already classical? Turns out, the collapse postulate + Born rule emerge! scirate.com/arxiv/2510.0... 🧪⚛️🧵1/5

Maite Arcos's PhD results are hitting the arxiv! A resource theory of gambling, and a paper on adversarial thermodynamics are out today. Gambling provides an operational way to quantify who has more information. And it can be extended into the quantum domain!🧵🧪⚛️ 1/

6,100 neutral-atom qubits trapped in a grid by lasers @caltech.edu ... is a lot. www.caltech.edu/about/news/c...

They sure take electromagnetism seriously in @quantumaephraim.bsky.social's lab!

In a recent Substack post, FQxI's Jonathan Oppenheim discusses how far #LLMS have progressed. @postquantum.bsky.social says "their answers often look very convincing on the surface until you go through them more carefully". DISCUSS: forums.fqxi.org/d/4283-how-g...

The CERN whitepaper, on testing the quantum nature of gravity, has even more co-authors and is now available on the arxiv, scirate.com/arxiv/2509.0.... Check it out! 🧪⚛️

There is one fundamental phenomenon that quantum physics can't explain: gravity go.nature.com/45v70f1

I'm at the African Institute for Mathematical Science Ghana this week for a quantum hackathon. Which is apparently called a Quantathon! Excited to interact with great students and researchers from across Africa. Live feed at t.co/J8UzPKc6Vx & schedule at qtedu.aims.edu.gh. Public lecture on Friday.

FACT THREAD on New Interstellar Object #A11pl3Z This story unfolded pretty fast yesterday for a few reasons. The object was discovered on July 1st UTC by the Asteroid Terrestrial-impact Last Alert System, or ATLAS team. A #NASA funded survey at the University of Hawaii. atlas.fallingstar.com 🔭🧪

!!!!! Waking up to the news that we might have found an interstellar object passing through our Solar System - only the third ever seen. Looks convincing based on the orbit.

NEW: NSF will be kicked out of their building. Announcement will be made tomorrow by HUD Sec. and Governor of VA. HUD will take over the NSF building over the next two years. NSF staffer: "There is no planning for NSF, no identified future location, appropriation for a new building or a move."

Just click on this: skyviewer.app/explorer #RubinTelescope

Sad news, Ray was both a a really kind man and a great scientist.

What if gravity isn’t a pull from mass, but a push from entropy? @georgemusser.com reports on the latest version of an old idea. www.quantamagazine.org/is-gravity-j...

Is there a way to stem the endless cavalcade of cats, birds, and sunsets flooding my feed? No matter how many times I hit 'show less like this,' they keep coming. Anyone else drowning in cats? @rose.bsky.team @jay.bsky.team @support.bsky.team

Scientists for Palestine is holding a school on quantum physics Palestinian students in Jordan in July, but they need donations to make it happen! 🇵🇸 www.scientists4palestine.org/palestinian-... www.gofundme.com/f/support-pa...

On Sunday, I'll be at the Cheltenham Science Festival, with Andrew Pontzen, Hiranya Peiris and Cham Ghag, discussing whether the phenomena we attribute to dark matter, could be explained by stochastic fluctuations in spacetime. Come say hello! www.cheltenhamfestivals.org/events/quant... 🧪⚛️

Elon Musk wanted to buy Wikipedia so that he could determine our society’s collective view of truth. He couldn’t, so he created grok. Do not let these machines be arbiters of truth. It is abundantly clear that they are being used to push absurd far-right conspiracies.

I wonder what the "Why don't you go and protest in China?" brigade will make of this news. www.carbonbrief.org/analysis-cle...

I'm at the Quantum Symposium at @uniofnottingham.bsky.social and they have a working Lego interferometer!

If we want fewer psychopaths in charge, we should start with ranked-choice voting. It’s about as complicated as picking pizza toppings with friends.

The final session, on "Table-top quantum experiments for gravity" with Flaminia Giacomini, Richard Howl and Sougato Bose, closes out the QISS conference in Vienna vienna2025.qiss.fr/index.html. The recorded talks and subsequent discussion should appear online in the coming days. 🧪⚛️

This past week, I received a second stop work order on one of my grants. This now means that we can no longer spend on *two* of my major grants. Several of my group members will now graduate earlier than expected, I am looking into being a consultant for the summer, and students will do internships

As someone who loves paradoxes and these two in particular, I'll be very disappointed if they're actually the same...

I've been asking various AI models math questions. I'm sure they'll one day be impressive mathematicians, but wow, they're insufferable! Confidently wrong, dopamine-addicted, and desperate for likes. I wrote up my experience here: open.substack.com/pub/superpos...

Tim Gowers @wtgowers.bsky.social claimed that Grok solved the Dubnový Blázen problem as an April Fools Day joke. Now Google thinks the Dubnový Blázen problem is a real problem in graph theory (it's Czech for "April Fools").

"Despite the hype, it’s been surprisingly challenging to find quantum algorithms that outperform classical ones. In this episode, Ewin Tang discusses her pioneering work in “dequantizing” quantum algorithms — and what it means for the future of quantum computing."

#TakedownTesla demo in London. Important to stand up to the xenophobic anti-science class war Musk and Trump are waging.

Not to be a wide-eyed naïf about such things but... am I right in thinking that they levelled an entire building to get to one guy and *that* is not controversial to anyone in the American media or political class, only that this information was recklessly shared in an unsecured chat?

This is part of DESI's recently released map of our universe. Each snowflake in this blizzard is a galaxy. Not sure if it's terrifying or comforting, but it's definitely jawdropping! More videos at noirlab.edu/public/video... 🌌⚛️ 🧪

JUST RELEASED: DESI DR1 & BAO RESULTS FROM DR2🌌

It wasn't long ago that @hossenfelder.bsky.social famously critical of new physics theories, highlighted the postquantum theory of gravity as one of the top five breakthroughs of 2024. But is the honeymoon over? ⚛️ 🧪1/

Jason Alicea opines that topological quantum computing is entering the POST-Q era. High quality topological qubits are not likely to arise suddenly; rather (like other qubits) they will improve gradually over an extended period. Jason explains here. quantumfrontiers.com/2025/03/05/w...

NEW: Official advisers CCC say UK shld cut emissions 87% by 2040 ⚖️Net cost of net-zero 73% less than thought 💷Total cost to 2050 = £108bn (~£4bn/yr, 0.2% GDP) 🏡🚗H’hold energy/fuel bills to fall £1,400 🔌Electrification is key THREAD + charts www.carbonbrief.org/... 1/10

Not surprising, but massive nonetheless. In case the dangers of closed LLM models controlled by oligarchs is not clear enough. uk.pcmag.com/ai/156828/gr...

Quantum computing is an exciting field and most experts believe we'll build a useful device within decades. But quantum-hype from tech companies do the field a massive disservice. To cut through the bullshit I'd recommend following... ⚛️ 🧪 🧵 1/

Thomas Piketty on the state we are in www.lemonde.fr/blog/piketty...