iiinova — where your digital self keeps evolving

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 24/08/2026

As true in the UK as it is in the US. There’s literally a levy on international students and it’s precipitated a slow-motion crisis. The UK government could step in at any time.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 23/08/2026

Quantum computing, in the present day, is the most useful when it’s used for studying quantum physics - sort of like having native hardware. That would include things like molecular interactions (very useful for drug discovery) and simulating quantum materials. And I certainly find it exciting!

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 31/07/2026

Our results have implications for future experiments – your effective disorder variables may need to be more than just random signs, but encode a diverse spread of amplitudes. However, this requires more qubits to encode! Hopefully we can test this experimentally soon :) arxiv.org/abs/2607.26156

arxiv.org

Role of flavor degrees of freedom in quantum simulations of disorder-free localization

A recent \texttt{Google Quantum AI} experiment [\href{https://www.science.org/doi/10.1126/science.adr9680}{Gyawali \textit{et al.}, Science \textbf{393}, 71 (2026)}] has exploited quantum parallelism ...

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 31/07/2026

We find, surprisingly, that the model mapping to two-level disorder wasn't enough to produce a true localised phase – in fact, we thermalise fairly quickly following a quench! Whereas for n = 4, 8 we see long-lived localisation and other signatures of a localised phase (like "area law" entanglement)

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 31/07/2026

The model in the Google experiment maps to an effective ensemble of disordered models, specifically a mixed-field Ising model with two-level discrete bond disorder. While they observe a localised regime at accessible timescales, we wanted to study how this changes with n-level disorder (for n > 2!)

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 31/07/2026

This was recently the subject of a Google Quantum AI experiment, which simulated DFL on a quantum processor (in the context of a lattice gauge theory). The lack of disorder means far fewer experimental shots are needed to run your simulation, meaning DFL is ideal for studying localisation phenomena

science.org

Observation of disorder-free localization using a (2+1)D lattice gauge theory on a quantum processor

Disorder-induced phenomena in quantum many-body systems pose a challenge for analytical and numerical approaches at relevant time and system scales. To reduce the cost of disorder sampling, we investi...

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 31/07/2026

New paper! arxiv.org/abs/2607.26156 ⚛️🧪 We study disorder-free localisation (DFL) - an intriguing phenomenon where dynamical degrees of freedom become localised and frozen, in the absence of the strong disorder (such as a random on-site magnetic field) normally needed to induce this effect. 🧵

Figure 1. (a) Schematic of a Z2 lattice gauge theory and its mapping to an effective spin chain with n-level bond disorder.
Top: Z2 gauge fields coupled to matter, with static external “flavor” particles coupled to the matter. Middle: After gauge fixing
and eliminating matter fields (see Appendix A), the model maps to a mixed-field Ising chain with disordered couplings gj , whose
signs and magnitudes are set by the occupations of the flavor particles. Bottom: Introducing n-level ancilla
Sj+1/2 renders
the model translationally invariant, enabling efficient disorder averaging (see Sec. V). (b) Each n-level ancilla requires log2(n)
qubits, with consequences for experimental simulation of disordered models. (c) Schematic summary of the phase diagrams
obtained in this work as a function of longitudinal field h and coupling µ. For n = 2 the system remains chaotic throughout
with slow dynamics at large h, while for n>2 localized and fragmented regimes emerge at large µ and h respectively.

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David Roberts @volts.wtf · 25/07/2026

Whew, the editors of @science.org are getting real.

science.org

The Assault On Science Funding Continues

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 04/07/2026

The problem is half the time they won’t believe you 😅

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Jacquelyn Gill @jacquelyngill.bsky.social · 29/05/2026

🧵 Public science in the US has taken some heavy hits over the last year, but the White House OMB is proposing a series of changes that will result in a TKO for science as we know it unless we fight back. Here's what's happening, and why it matters. 1/n

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 25/05/2026

I’m 95% of the way towards publishing in Nature. The remaining 5% of work is focused on obtaining a groundbreaking result and writing it up.

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University and College Union (UCU) @ucu.org.uk · 22/05/2026

Equality is not conditional. Dignity at work is not negotiable. The EHRC Code of Practice has been published. UCU is examining it urgently. This is a significant and unsettling moment and we will not leave branches to navigate it alone. www.ucu.org.uk/article/1451...

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University of Nottingham UCU branch @uonucu.bsky.social · 20/05/2026

If you wish to support our efforts, you can do so here. Any funds donated here will be used to off set any loss income suffered by those of us mabbing. www.justgiving.com/crowdfunding... You can also donate here: UCU Nottingham LA63 Hardship Fund Account number: 20346359 Sort code: 60-83-01

justgiving.com

Help raise £10000 to support the Nottingham UCU hardship fund – JustGiving Crowdfunding

Iʼm raising money to support the Nottingham UCU hardship fund. Support this JustGiving Crowdfunding Page.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 15/05/2026

If you’re a physicist please sign this! ⚛️🧪

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 14/05/2026

I've seen some great "University of Nothingham" signs/posters about

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Anne Green @ultrawimp.bsky.social · 14/05/2026

Physicists: please consider signing this open letter of support: nottinghamphysics.github.io/Open_Letter/ The University wants to cut a third of academic and related staff from the School of Physics and Astronomy.

nottinghamphysics.github.io

Save Nottingham Physics and Astronomy

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Astronomer Royal for Scotland | Catherine Heymans @astroroyalscot.bsky.social · 14/05/2026

Yesterday, 56 of our fab colleagues at the Physics & Astronomy dept in Nottingham, received “at risk of redundancy” letters. The Uni is planning to reduce the size of the Physics dept by almost a third.🧪⚛️🔭 Sign this petition to show them your support ✍️: nottinghamphysics.github.io/Open_Letter/

Petition statement

We, the undersigned, call on the University of Nottingham to reverse its plans to impose compulsory redundancies on its staff in the School of Physics and Astronomy.

The University threatens to cut twenty members of staff out of the seventy one currently in the School. On 12 May, fifty six of those members of staff received letters notifying them that they were at risk of redundancy. This affects academic and technical staff at all levels, from Research Fellows to Professors.

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The Hilbert Space Post @hilbertspacepost.bsky.social · 12/05/2026

In the May 12th edition: - Quantum simulation of magnetic materials - Photonic quantum machine learning - quantum metrology via partial quantum error correction - Real-time QLDPC decoding - Quantum simulation of quantum non-equilibrium steady state More details and links below:

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The Hilbert Space Post @hilbertspacepost.bsky.social · 12/05/2026

A trapped-ion quantum computer can experimentally simulate the stochastic dynamics of interacting open quantum systems in two dimensions using quantum trajectories. This enables the study of non-equilibrium transport phenomena. arxiv.org/abs/2605.08350

arxiv.org

Quantum trajectory simulation of two-dimensional non-equilibrium steady states with a trapped ion quantum processor

Digital quantum computers offer a promising route for studying complex many-body systems that are otherwise inaccessible by their classical counterparts. Capabilities including mid-circuit measurement...

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Nadia Whittome MP @nadiawhittomemp.bsky.social · 14/05/2026

Every affiliated trade union has said that Keir Starmer cannot lead us into the next election and calls for a new leader. We need to show that we’ve learnt from the government’s mistakes and get on with delivering the change that people expected. 1/2

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Glen O'Hara @gsoh31.bsky.social · 12/05/2026

What can one even say any more. The Nothing will eat almost the entire sector if controls aren't brought into force. Hey, government! Anyone there? www.bbc.co.uk/news/article...

bbc.co.uk

University of Nottingham puts 2,700 staff at risk of redundancy

The University of Nottingham says it is facing

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Chris Tregenza @tregenza.bsky.social · 12/05/2026

2,700 staff at the University of Nottingham have received 'at risk' letters from the management. The same management which refused to cut their own pay, and the same management which refused to resign after losing £60 million on a disastrous attempt to build a new campus. #JoinAUnion

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 12/05/2026

There’s a lot more rich & interesting physics in this setup, too - some in this paper today, and some that I’m still working on (watch this space!). But looking more broadly, our results really highlight the utility of quantum computers as a platform to study open system dynamics.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 12/05/2026

We were able to study the transport of both fermions and hard-core bosons, measuring the currents through the system, and seeing how these responded to turning on a magnetic field or interactions between particles. Below, we see that turning on the magnetic field (b) pushes currents to the edge!

(a) Final snapshots for the local density and instantaneous currents measured on the H1-1 device for fermions with V = 0,ϕ = 0 (m = 14 timesteps, ∆t = 0.21), and (b) for V = 0,ϕ= π/2 (m = 16 timesteps, ∆t = 0.27). Both snapshots were averaged over 1480 trajectories.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 12/05/2026

New paper from our group today! arxiv.org/abs/2605.08350 Using a quantum computer, we simulated trajectories of an open quantum system - that is, one that interacts with the surrounding environment, in this case by injecting particles at one end of a 2D lattice and removing them from the other. ⚛️🧪

FIG. 1. (a) The setup consists of a 4 × 4 square lattice with nearest neighbour hopping (directed arrows) and interactions (dashed line). Stochastic driving acts on the two corner sites labelled “source” (red) and “drain” (blue) with probability p.

(b) Schematic of the quantum trajectory realised by our driving scheme, showing the local density on the source (top) and the total particle number (bottom). The black line is a single trajectory, with source and drain jumps indicated by dashed lines, and grey line indicates the average.

(c) The corresponding circuit starts with unitary state preparation followed by unitary evolution using a Trotter decomposition. The non-unitary step uses an ancilla qubit for a “quantum coin flip” with probability p that classically conditions a measurement and reset on the source and drain. After m timesteps of the unitary and non-unitary drive we perform a full-circuit measurement to extract observables such as local densities and currents

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 24/04/2026

This is a full-frontal attack on academic freedom. I hope some thesis advisors there will be brave enough to challenge it.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 05/04/2026

We were decorating hot cross buns today so I attempted to make a quantum physics one…I’ll have to work on my icing skills 😅

A brown, rounded bun with icing on it. The icing reads, in terrible handwriting, Hψ = i dψ/dt

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 20/03/2026

Watched the new Spiderman trailer, why is *this* the moment I’m excited by? 😅 (No, not Bruce Banner, what’s behind him!)

A still from the new Spider-Man trailer. It shows Bruce Banner (played by Mark Ruffalo) standing in front of a presentation slide on “Lattice Quantum Chromodynamics (QCD)”, although he’s standing in the way of most of it

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 02/03/2026

I think, just like the Gatwick Express (literally the *same speed* as Southern services along the same line, and no faster than Thameslink too), it's a stealth tourist tax!

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 02/03/2026

And I think that context is the reason she got slated by liberals. She's in effect arguing for capitulation to imperialist expansion, bombing children, and ethnic cleansing.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 02/03/2026

But just like Eisenhower, the rest of her foreign policy is really grim. She doesn't actually oppose war & suffering, she just opposes us spending any money on defence. And she's fine with it when it's committed by countries like Russia (like when she condemned *NATO* after Russia invaded Ukraine)

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Jack Bailey @jack-bailey.co.uk · 02/03/2026

I know so many immensely talented people who are just not going to get jobs in academia. The number of post-docs and job openings is so much lower than just a few years ago. The conditions are brutal.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 27/02/2026

Weirdest Disney On Ice show I’ve ever seen

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 26/02/2026

When I say "senior" I just mean not early-career, so I don't think that explains it! I think they also don't realise how big the science community on Bluesky is already.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 22/02/2026

In the time I was active as a physicist on Twitter I did have some good discussions. Deleted my account soon after it became X.

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 22/02/2026

Like I just checked and none of the senior academics I’ve worked with are on here, so at least in my field the discussion is just absent

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 22/02/2026

I wonder if it’s because a lot of the big names are staying on X (in the mistaken belief that’s where the audience is) and only occasionally logging on here to promote a new paper?

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 21/02/2026

Labour really think they have a divine right to every seat that doesn’t go Tory (or, in these days, Reform) lol

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 21/02/2026

That’s utterly bizarre. Most journals I’ve seen say explicitly not to worry about style guidelines until the last moment, and just expect you to get the right general length and structure. I’m astonished they’d desk reject you for that!

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 21/02/2026

I’m guessing an anti-proton, maybe? Otherwise it would be ‘negatron’ presumably

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 30/01/2026

I mean that's true, there would be short term inflation but since those at the bottom would get a much bigger (proportional) boost from UBI than they'd lose to inflation, it'd be a net positive for them. And the benefit of having that permanent safety net to fall back on can't be overstated, either

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 24/12/2025

It’s Christmas Eve, I’m on holiday in France, and somehow I’m getting emails from a journal chasing me up about whether I’m going to review a paper. They want me to reply within 3 days! Even their own offices are closed right now, according to their website…

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Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 24/11/2025

Are they actually trying to destroy British universities???

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