@jarvist.bsky.social - Jarvist Moore Frost

26 Aug 2026 16:55 +0000

As someone who spends a lot of time mangling data on the command line, this seems super useful! [contains quote post or other embedded content]

23 Aug 2026 23:41 +0000

That 1/Delta-E bit in the super-exchange effective transfer integral? Yes, as you might guess it is from perturbation theory, and it does blow up at resonance. However, I was shocked that the full non-singular non-perturbative expression just involves taking the determinant of a 3x3 matrix! #_#

13 Aug 2026 09:49 +0000

I was at a kids 'softplay' at the weekend was horrified to realise that custom AI generated songs now play nonstop through the park, with inane LLM generated lyrics which make no sense: "going on a walk... pack my map and my pencil... and my capstan [!?] and my magnifying ray.[!?]" [contains quote post or other embedded content]

04 Aug 2026 06:19 +0000

New preprint: SPINDRIFT Rather than infer the maximally entangled ground state wavefunction from nothing, why not watch the correlations condense from the quantum mechanical 'purity' of infinite temperature as we project along continuous imaginary time? arxiv.org/abs/2607.29590 https://arxiv.org/abs/2607.29590

24 Jul 2026 21:19 +0000

Ingvars' first-two-years of PhD battling the devious Fermion signs! Following the Zaanen and Kruger observation that a simple hydrodynamic backflow can give complex fractal nodal surfaces, we married this to a PIMD code and set about optimising parameters; first via a CNF arxiv.org/abs/2604.01963 https://arxiv.org/abs/2604.01963

23 Jul 2026 23:10 +0000

Now we have a Thames water hosepipe ban, I went looking for the data. It's here: https://data.london.gov.uk/dataset/london-reservoir-levels-24ry5/ It seems the level is kept near 100% until July (presumably abstracting from the Thames?) and then we drink down the reservoirs, sometimes until as late as November (!)

17 Jul 2026 08:20 +0000

Preprint on the ArXiv: arxiv.org/abs/2607.15060 Mostly the same as the talk, a bit more consideration on the results. [contains quote post or other embedded content]

26 Jun 2026 22:45 +0000

Sad times! Twenty years ago I was sailing home from the Azores, solo, and so glad to pickup 198 kHz and the dulcet tones of the shipping forecast as I approached the edge of Sole, no longer having to fiddle the short wave to try and understand the Meteo-France SSB broadcast. [contains quote post or other embedded content]

21 Jun 2026 22:13 +0000

A Machine Learning workflow to design antimicrobial peptides. Open source, open science. The work of three fantastic MSci students projects at the Department of Chemistry, Imperial College London, by Kam, Igor and Lucrezia, all building on top of each other. https://www.biorxiv.org/cgi/content/short/2026.06.16.732639v1

19 Jun 2026 20:24 +0000

I don't know if I feel better or worse about my own dirty solar panels... Mine are less filthy, bertainly a first floor roof in London is more accessible! [contains quote post or other embedded content]

11 Jun 2026 09:04 +0000

New paper! arxiv.org/abs/2606.12221 From building an effective model to simulate non-adiabatic dynamics in Y6 in the solid state, we noticed that spin-orbit-coupling was massively enhanced in (singlet charge transfer) <=> (triplet Frenkel) excitons. We attribute this to a generalised El-Sayed rule. https://arxiv.org/abs/2606.12221

08 Jun 2026 09:31 +0000

Motivated by the latest round of undergraduate project report reading and marking, I wrote a little essay / group guide to using LLMs in science. As I thought this might be useful beyond my little research group, I made it public: https://docs.google.com/document/d/1Lx48NuMjAm5HITPMIUzOQkSHPEtvuglE09s97UUWBfI/edit?usp=sharing

08 Jun 2026 08:07 +0000

Growing out of our ML4ATOMS cross-London TYC journal club, we now have a 'think-piece' on Machine-Learned Interatomic Potentials. So far, these really are the 'killer app' for machine learning in condensed matter / chemistry, so well worth thinking where they go next! arxiv.org/abs/2606.07327 https://arxiv.org/abs/2606.07327