Jake Xuereb

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...)

Chain of quantum two level systems. Excitations traveling from left to right, each time marking a tick when they leave on the right.

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.

(2/2) Couldn't let go of the mountains and spent the past week at Ecole de Physique in Les Houches.

Learning about unconventional computational platforms, machine learning theory and physics of computing at an amazing workshop titled "Computing with Physical Systems".

Hope 2 be back here someday.

YouTube video by Center for Quantum Science and Engineering EPFL QSE Seminar - Jake Xuereb, Cooling a Qubit using n Others

(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

(15/14) Oh and If I've forgotten your favourite paper, do comment and let me know!

(14/14) Overall, I'd say it was a quieter year than 2024 for quantum thermo. Less new directions than in 2024 but still a great push from the community.

Here's hoping 2026 holds many exciting insights using quantum thermodynamics across many fields from biology to computer science.

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(13/14) Last but not least a shout out to @itsmealeale.bsky.social for the most well written and aesthetically pleasing work of the year, his beautiful review on the Maxwell's Demon paradox from theory to experiment

[13] - arxiv.org/abs/2503.07740

(12/14) Xu, @artemyte.bsky.social , Delvenne, Ito: a really foundational stochastic thermodynamics result giving a geometric spectral bound for Markov rate matrices.

[12] - arxiv.org/abs/2507.08938

(11/14) Honourable mention to two cool results in fields adjacent to quantum thermo :

(i) @ulyssechabaud.bsky.social & collaborators: a great paper on how the computational ability of photonic/bosonic systems is reduced under energetic constraints.

[11] - arxiv.org/abs/2510.08545

(10/14) Joey Schindler & collaborators: showing cross entropy is the “mother of all entropies” (in a thermodynamic sense), and unifying observational entropy with Jaynes-style maximum entropy principles.

[10] - arxiv.org/abs/2503.15612

(9/14) Two impressive conceptual works this year were:
(i) Manu Schwarzhans & collaborators: a minimal model of an autonomous thermal machine acting as a quantum detector, giving thermodynamic constraints on measurement performance. [9]

[9] - arxiv.org/abs/2508.16375

(8/14) We also got a wonderful experiment from Pekola’s group where quantum coherence was converted to heat dissipation in a cavity qed set up, directly probing quantum signatures in heat transfer. [7]

[7] - arxiv.org/abs/2510.23092

(7/14) Experimentally, we saw two great results in double quantum dot platforms from the Ares and Ennslin groups, showing steady progress in reading out quantum thermodynamic quantities in these systems. [5,6]

[5] - arxiv.org/abs/2502.00096
[6] - arxiv.org/abs/2508.09481

(6/14) Bergamaschi & Chen show that any 1D spin chain with nearest-neighbour int. can thermalise at any temperature, using clustering of correlations methods.

This is a step forward, relaxing earlier local-commutativity requirements.
[3] - arxiv.org/abs/2505.20064
[4] - arxiv.org/abs/2510.08533

(5/14) Thermalisation and Gibbs sampling remain extremely active. Two stand-out results among many this year were:
Scandi & @alvalhambra.bsky.social derive a master equation that thermalises assuming only a (KMS) detailed balance condition — without relying on the rotating wave approximation. [3]

(4/14)To my taste, both were properly out-of-the-ballpark theory works.

[1] arxiv.org/abs/2506.19188

[2] arxiv.org/abs/2504.12373

(3/14) (ii) Watanabe & @ryujitakagi.bsky.social continued their exploration of work extraction from unknown quantum states. They bring Schur–Weyl duality tools into qthermo, giving protocols that asymptotically achieve the same rate as if the state were known. [2]

(2/14) Two strong theory works that brought genuinely new ideas forward were:

(i) Abiuso & collaborators’ effort to prove a Planckian time bound for thermalisation, using ideas from quantum metrology. [1]

🧵 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.

Classical gravity cannot mediate entanglement In Nature, 646, 813 (2025), Aziz and Howl claim that classical (unquantised) gravity produces entanglement. We show that their model does not produce entanglement. Even if the model produced entanglem...

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... 🧪⚛️

I think it's really cool that you've been using this detailed author contribution system - hope you keep doing it despite the headache and that it inspires other PIs!

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