Beautiful @johncarlosbaez.bsky.social thread, feels like old quantum twitter again 😭

The Qalypso School on Quantum Science in Malta returns for its 3rd edition Aug 31 - Sep 4 this year! 🏖️ We have a great line up of lecturers covering Quantum Optimisation, Quantum Thermodynamics and Quantum Gibbs Sampling. Pre-registrations opens today at forms.gle/3NkMJ3Br9V8b... Do Share!

Landauer was such a gangster. Maybe I should get this on a t-shirt (ieeexplore.ieee.org/document/521...)

From one tick to the next, small timing uncertainties in clocks usually add up because of the independence of errors. Using fermions tunneling through a quantum wire as clock ticks, we found a way to build a clock where errors cancel out rather than accumulate. arxiv.org/abs/2601.10785

Can Gottesman–Kitaev–Preskill (GKP) encoding turn homodyne detection into a practical tool for revealing Bell nonlocality? The answer is yes, and in fact GKP states also lead to strong and robust multipartite nonlocality with homodyne detection! Today on arXiv: arxiv.org/abs/2601.16189 1/n.

(1/2) Got on a train a week ago headed from Vienna to Lausanne and spent some days hanging out at EPFL. Was fortunate to be able to share our insights from our recent PRX Q on Cooling a Qubit using N Others at -- recording here 👁 Warm thanks to @qzoeholmes.bsky.social and Jon Conrad for having me

🧵 Here is a thread reviewing what in my view were some of the stand out works in Quantum Thermodynamics that appeared on the arXiv for 2025. (1/14) #quantum #thermodynamics

Quite happy seeing this work out now in @prxquantum.bsky.social It was great fun working with my collaborators on this one. Especially pleased to have brought some graph theoretic combinatorics to Quantum Thermodynamics 🔥🧊 journals.aps.org/prxquantum/a...

Here are a couple of neat theorems due to John Conway and Cameron Gordon (1983): Any embedding of K_6 in 3D has two linked triangles (red and blue below). Any embedding of K_7 in 3D has a knotted Hamiltonian circuit (red below). Article: people.reed.edu/~ormsbyk/138...

If you wanna know more about where I'm from, where it's at and why it's there -- this article is a good analysis of the economics and corruption that led to the current state of affairs in Malta.

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... 🧪⚛️

arxiv.org/abs/2511.02683 Gravity mediated entanglement arXiv posting of the day. This time from across the road, IQOQI Vienna's Andrea di Biagio reminds us about important assumptions different models make and why it's hard to make a model independent no-go theorem.

arxiv.org/abs/2511.00852 The saga continues, my favourite of the reactions to the Aziz, Howl paper so far. A sharp and straightforward passage from Diosi makes clearer why the semi-classical treatment does not agree with the calculation of Aziz and Howl.

"no amount of QFT machinery will ever change that fact" Who needs reality TV when you've got quant-ph arguments about the quantum nature of gravity I'm biased towards the guys with the peer reviewed careful math, not the overnight 2 eq arxiv posting tbh arxiv.org/abs/2510.19969

V3 of this manuscript is on the arXiv today : arxiv.org/abs/2505.15887 You'll find : -a friendlier presentation for people from outside the quantum thermosphere -a probabilistic bipartite heat exchange that approaches the capabilities of the n-partite interaction of V1 -cleaner inequalities!

I am learning so much about learning

105 new submission in 1 day. "2 arxiv submissions a year, those are rookie numbers in this racket" Still waiting for an argument for how this rate of production benefits us or science at large.

Amazing to see the work of @itsmealeale.bsky.social and Partyk L Bartosik highlighted like this. Having followed it as it was written and knowing the hard work that was poured into it, really brings a smile to one's face to see it highlighted. Yes to detecting entanglement using thermodynamics!

Considering creating an anonymous google form survey for researcher in QInfo with questions on what roles collaborators have in projects. E.g. What roles does a last author have in a project vs What roles does a first author have Would you fill it out? What questions would be interested in?

More collage art about Quantun Information please

Good morning from TQC 2025 in Bengalore IISC 🇮🇳 I'm here spreading some Quantum Thermo propaganda to the Algo, Crypto people - pass by poster 72 if interested in (arxiv.org/abs/2505.15887) Bengalore has been overwhelming, awesome, beautiful and tasty so far

I think the number of single author arXiv postings on quant-ph is steadily increasing. E.g. today 7/48 postings were single author. Has anyone else been noticing this? Surely it's due to GPTs being good paper writing assitants, right?

Anyone else headed to TQC in Bengaluru and hanging out a bit the week after? Do send a message if yes and you're up for hanging out after the conference. 😄 tqc-conference.org

(1/n) I’ve been binging some golden oldies from the optomech boom of the late 2000s and was surprised to find that the currently popular gravitationally mediated entanglement "is gravity quantum" experimental proposals -- find their origin there. Here’s a little thread on that lineage. 🧵

I've gotten into dumpster diving through Scirate for old discussions. A journal club with a time machine. Here's one on how you could build a Qcomputer out of 1 photon but "a photon as wide as the universe would be like ∼100 qubits" from @mankei-tsang.bsky.social scirate.com/arxiv/1909.0...

Warm and well deserved congratulations to @itsmealeale.bsky.social and coauthors on the most beautiful review to ever grace the pages of Physical Review 🎆 I'm sure many students will be thankful for years to come for having learnt about how to carry out thermodynamic exorcisms from this tutorial 😈

"You're a cargo cult scientist, A real crank turning nihilist, I only found your citations-- On Google Squalor" Avidly preparing for my next academic rap battle, that's how tenure works right?

(1/3) Updated on the arXiv this morning! No more painful typos and new appendices. One comparing our sample complexity with that of classical probabilistic approaches and another providing a recipe for oracles to prepare thermal machines. arxiv.org/abs/2505.15887

View of the Maltese Archipelago from Gozo this morning 🇲🇹

Easy to feel powerless in times like these. Trying to remember that science is a political act and a force that brings people together from all over the world out of excitement for the beauty of nature. In this sense, science is an act of defiance against those that wish to divide humanity.

(1/n) Today on the arXiv, we examine the folklore that cooling a quantum system with access to another requires one to order their joint state eigenvalues in decreasing order and find that this sorting is actually dictated by a simple set of inequalities. scirate.com/arxiv/2506.1...

Totally like not tweeting about this for any specific reasons but the surname Jozsa as in Deutsch-Jozsa is spelled "zs" not "sz" in case like I dunno you like umm put an arxiv posting with this name in the title...

I think a lot about how Aaron Swartz committed suicide while facing a probably long jail sentence for download some of JSTOR, but no one at Meta is going to face any repercussions for using all of Libgen to train its AI.

Deep congratulations to the whole team but especially to Florian on what I'm sure is only his first Nature Physics paper. I am also super happy to see the Malta - Vienna connection crystallized in such a paper facilitated by @aspects-quantum.bsky.social

(1/7)On a train to Styria, headed for a weekend of hiking I kept thinking 𝘤𝘢𝘯 𝘢 𝘩𝘦𝘢𝘵 𝘦𝘹𝘤𝘩𝘢𝘯𝘨𝘦 𝘣𝘦 𝘶𝘴𝘦𝘥 𝘧𝘰𝘳 𝘢 𝘤𝘰𝘮𝘱𝘶𝘵𝘢𝘵𝘪𝘰𝘯? In today's arXiv, I show that a heat exchange between a qubit and a thermal machine can be used to solve some old school query complexity problems. scirate.com/arxiv/2505.1...

Very proud of the @univie.ac.at under grad physics society Roter Vektor for standing up for science today and peaceful distributing these flyers and picketing after the talk. Shame on Uni Wien for using security to intimidate. Cheers @graemesmith.bsky.social for the flyer inspiration 😉

Going to start a big band. Our music will improve exponentially in the no. of instruments involved. We'll be called log-a-rhythms.

(1/3) Next week John Clauser, the C in the CHSH inequality, a pioneer of experimental quantum information and unabashed climate change denier (see link) will give a distinguished lecture here in Vienna. I think I'll be there with a placard. archive.is/202407280905...

I don't recommend putting the wavefunction in your mouth, it's unhygienic arxiv.org/abs/2504.17911

(1/3) No one has the time to read. PIs and Senior post docs are too busy applying or reporting on grants, others too busy being involved in many projects to grow their portfolio etc How did we end up here? Who does this benefit? How do we get out?

Stumbled on the QIP2015 YT channel which is a cool time capsule 10 years on. Feat. talks on area law violations, spectrum estimation, error correction and resource theory... dare I say there was more physics than in recent eds? www.youtube.com/@QIP-hq8vw/v...

From the @gigipomu.bsky.social -itos this morning, who are thoughtful enough to include cute animals in mathematical texts about quantum optimal transport. arxiv.org/abs/2504.04856

(1/4) It's a great for quantum physics on the arXiv, quite a few cool preprints made it to the arxiv this morning. Here's a round-up of 4 preprints I found particularly compelling 🧵

Wow, this is quite sad. Another reminder that celebrating ideas is much more apt than celebrating people.

For sigbovik, I factored all 8 bit ints (up to 255) with a quantum computer github.com/strilanc/fal... I did it as legit as I possibly could. I ran a correct circuit with no optimization shenanigans. I did correct pre/postprocessing. It took 121 quantum samples to finish the entire task. But...

I have disproven the Eigenstate Thermalisation Hypothesis. Turns out, most quantum systems evolve such that expectation values for most observables look like those of a state I have just written down. I will not share it. It is mine. Mine, mine, mine!

Sms alot of people wanna go to Benasque QI than one can fit in the beautiful tiny village. Having organised a bunch of stuff in Malta, I feel the urge to organise a straggler event on the island of Gozo. If interested, fill this form so I can gauge interest - share! forms.gle/azwrJe8AidrS...

An excellent antidote against pervasive hagiography, hero worship and simplistic narratives in quantum history by @ryandahn.com @physicstoday.bsky.social #IYQ2025 #Quantum #IYQ pubs.aip.org/physicstoday...

In act of mild defiance against the doom on my timeline, enjoy some photos I took whilst doing physics at our home, the Atominstitut this past week and a teaser of the work we're scribbling everywhere

Just leaving this meme I made for a quick talk I'm giving today here. Temperature is not really real and you know it.