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!

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!

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.

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

Glad someone took the time to debunk the (obviously nonsensical) claim that Bell inequalities could be violated w/o entanglement. It is astonishing (to say the least) that this claim was made by experienced authors & that it passed peer review in the first place, does not reflect well on the journal

Bell Inequality Violations Without Entanglement? It's Just Postselection

Recently Wang et al. have reported a violation of a Bell inequality without entanglement [arXiv:2507.07756]. We show that their result is an artifact of postselection. It is well known that postselect...

arxiv.org

A fun project with Seok Hyung, Jeongrak ( @perp-waterfall.bsky.social ), @nellynghy.bsky.social , and Paul Boes. We dusted off some old notes because there seemed to be renewed interest in what differentiates thermal operations from Gibbs-preserving maps. arxiv.org/abs/2507.16637

Thermal operations from informational equilibrium

Thermal operations are quantum channels that have taken a prominent role in deriving fundamental thermodynamic limitations in quantum systems. We show that these channels are uniquely characterized by...

arxiv.org

Nelly Ng@nellynghy.bsky.social · last yr.

Whether or not you're a fan of thermal operations, there's something fundamentally special about them: by pinning down what it means to equilibrate, thermal operations uniquely emerge! With this, we also uncover nice hierarchy of unital channels, in contrast with the classical Birkhoff theorem.

Thanks to @phys.org.web.brid.gy for covering our recent work with @stotti-alex.bsky.social and @lvanluijk.bsky.social on embezzlement of entanglement in critical systems: phys.org/news/2025-06... Paper: www.nature.com/articles/s41...

Universal embezzlers naturally emerge in critical fermion systems, study finds

Embezzlement of entanglement is an exotic phenomenon in quantum information science, describing the possibility of extracting entanglement from a resource system without changing its quantum state. In...

phys.org

Congrats to Jake and all the collaborators for this fantastic work. They take the well studied problem of cooling quantum systems and use cool mathematics from group and graph theory to systematically characterize and solve that problem.

Jake Xuereb@curlyqubit.bsky.social · last yr.

(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...

What started as informal discussions on the Danube beach in Vienna during QTD2023 has been published at last. Trying to come up with an experimentally feasible quantum clock we came across a rich model – the ring clock – that overturned a common wisdom in the community. doi.org/10.1038/s415...

Don't forget to submit your abstract for our conference in Dublin, August 2025! www.aspects-quantum.com/flqt2025

FLQT 2025 — ASPECTS

Fundamental Limits of Quantum Technologies conference, Dublin, 25-29 August 2025

aspects-quantum.com

We are excited for Fundamental Limits of Quantum Technologies conference, Dublin, 25-29 August. Only three weeks left until the abstract submission deadline, don't delay! All details at www.aspects-quantum.com/flqt2025

FLQT 2025 — ASPECTS

Fundamental Limits of Quantum Technologies conference, Dublin, 25-29 August 2025

aspects-quantum.com

Mark Mitchison@mitchison.bsky.social · last yr.

Check out our amazing list of invited speakers! 🤩 Janet Anders (Exeter/Potdsam) Elena Blokhina* (Equal1) Kay Brandner (Nottingham) Anthony Kiely (UCD) Nikolai Kiesel* (Vienna) Sabrina Maniscalco (Algorithmiq) Johannes Jakob Meyer (FU Berlin) Kavan Modi (SUTD) George Mouloudakis (FU Berlin) *TBC

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...

Gozo QI - Expression of Interest

I really like no timetable free discussion workshops. It seems like the Benasque Quantum Information Workshop has gotten too many applicants to cater for the demand. Having organised a couple confer...

forms.gle

We’re organising a conference in Dublin! Fundamental Limits of Quantum Technologies 2025 — everything from error mitigation on NISQ devices, through control constraints on complex quantum systems, to quantum thermodynamics and energetics, and much more! Abstract submission and registration open! 👇

NAresgroup@naresgroup.bsky.social · last yr.

🔥 Excited to announce 'Fundamental Limits of Quantum Technologies', a conference at The Alex Hotel, Dublin, 25–29 August 2025! 🌐 Abstracts & early-bird registration now open: www.aspects-quantum.com/flqt2025

Wrote up a little tutorial + review on higher-order quantum operations. If you love quantum channels, you can think of these as linear maps that act on channels themselves in manner fully consistent with quantum theory! I hope it helps future students / researchers! 🤗 arxiv.org/abs/2503.09693

Higher-Order Quantum Operations

An operational description of quantum phenomena concerns developing models that describe experimentally observed behaviour. $\textit{Higher-order quantum operations}\unicode{x2014}$quantum operations ...

arxiv.org

Latest preprint from the ASPECTS consortium! arxiv.org/abs/2502.00096 Experiments by the amazing @naresgroup.bsky.social and theory by @mathsmire.bsky.social of @quitphysics.info We measured the entropy cost of generating and recording ticks in a microscopic clock 1/6 🧵👇

Now that our recent work on the emergence of a 2nd law of thermodynamics in isolated quantum systems has been published, I thought it may be a good opportunity to share some animations outlining the intuition for the principle behind it. doi.org/10.1103/PRXQ... See thread below 👇

Bonjour Grenoble! Nice to see the beauty of the alps in Austria stretches all the way to France 🏔️ Here to visit the QEI conf. and curious to learn how others think about thermo of quantum computation. Tomorrow I'll talk about work (arXiv:2402.00111) we did in Vienna. Come by if you are around.

Nice article about the history of the idea of entropy over the last 200 years. I'll have more to say about this in the new year 👀

Quanta Magazine@quantamagazine.org · 2y ago

The second law of thermodynamics states that a quantity called entropy is on the rise, indicating that the universe is predisposed to disorder. But the idea of entropy is evolving. www.quantamagazine.org/what-is-entr...

Pretty cool to see some work we were involved in recognised by New Scientist as some of the 'wildest physics' they covered in 2024! www.newscientist.com/article/2458...

These are the most mind-melting physics discoveries of 2024

We collected some of the wildest physics that New Scientist covered in 2024, findings that are forcing scientists – and us – to rethink reality

newscientist.com