Dr Jared Jeyaretnam ⚛️🧪

Dr Jared Jeyaretnam ⚛️🧪

@jaredjeya.github.io

I study non-equilibrium quantum many-body physics from a quantum circuit perspective at the University of Nottingham. Also passionate about science outreach! He/him 🌐 jaredjeya.github.io PS: All opinions solely my own.

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Our article was featured in Communications Physics!

Communications Physics@commsphys.nature.com

Our featured article for April 2025 Quantum electrodynamics on a 1D lattice can lead to localization of charges, in contrast to the thermalizing dynamics. This study identifies the origin of such non-thermal signatures and attribute it to the fracturing of the underlying Hilbert space. rdcu.be/el8h7

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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)

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.orgRole of flavor degrees of freedom in quantum simulations of disorder-free localizationA 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 ...

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.orgObservation of disorder-free localization using a (2+1)D lattice gauge theory on a quantum processorDisorder-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...

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!)

Our article was featured in Communications Physics!

Communications Physics@commsphys.nature.com

Our featured article for April 2025 Quantum electrodynamics on a 1D lattice can lead to localization of charges, in contrast to the thermalizing dynamics. This study identifies the origin of such non-thermal signatures and attribute it to the fracturing of the underlying Hilbert space. rdcu.be/el8h7

Dr Jared Jeyaretnam ⚛️🧪 reposted

Replying to @uonucu.bsky.social

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.comHelp raise £10000 to support the Nottingham UCU hardship fund – JustGiving CrowdfundingIʼm raising money to support the Nottingham UCU hardship fund. Support this JustGiving Crowdfunding Page.

Dr Jared Jeyaretnam ⚛️🧪 reposted

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/

STFC cuts will accelerate the closure of UK physics departments, even though everyone recognises the importance & value of physics to UK PLC. Physics is explicitly listed as an area affected by planned compulsory redundancies at Nottingham. So sad to see this. www.theguardian.com/education/20...

Dr Jared Jeyaretnam ⚛️🧪 reposted

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:

Dr Jared Jeyaretnam ⚛️🧪 reposted

Dr Jared Jeyaretnam ⚛️🧪 reposted

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

Dr Jared Jeyaretnam ⚛️🧪 reposted

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

Photo by @tregenza.bsky.social

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!

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.

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

Riki Wilchins@rikiwilchins.bsky.social

@rikiwilchins.bsky.social [Texas cont] In an additional attempt to suppress LGBTQ+ speech, the policy includes STUDENTS: "no degree-culminating student research within the TTU System will be permitted to center on SOGI topics,” thus extending "Don't Say Gay" to dissertations and theses. 2/2

Dr Jared Jeyaretnam ⚛️🧪 reposted

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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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…

Dr Jared Jeyaretnam ⚛️🧪 reposted

Solidarity with @uonucu.bsky.social members striking over the possible 200+ job cuts at the University of Nottingham, after 650 staff lost their jobs in the past two years. I also share their deep concerns about new plans to suspend 48 courses, including nursing, modern languages, and music.

An amazing day of solidarity with staff, students, and community members saying NO to compulsory redundancies and unnecessary course closures.

Some petitions to sign to protest Nottingham’s cuts! #AcademicSky Save Modern Languages - c.org/D5v6qstzyW Save Agriculture - c.org/bgxhcKVHYk

c.orgSign the PetitionStop the removal of Modern Languages courses at the University of Nottingham!
Dr Jared Jeyaretnam ⚛️🧪@jaredjeya.github.io

I can't express how damaging this is, music and languages aren't just optional extras, they are at the core of what a university does: cultivate knowledge and culture in the next generation. And if they'll cut those, what's next? It's institutional self-destruction. www.bbc.com/news/article...

Dr Jared Jeyaretnam ⚛️🧪 reposted

You know it's a pretty bad decision when the response from people is to create about 100 different petitions... Sign every one. Let's fight this by all means necessary.

Hannah Robbins (they/them)@drhannahrobbins.bsky.social

Although I am inevitably caught up in the likely dire implications for my department (Music), it isn’t just us in the Faculty of Arts or in the university under threat. Do consider signing this petition in support of colleagues teaching Theology! c.org/6kntRm2JVh

Wake me up when this has been independently verified by an external research group!

Physics World@physicsworld.bsky.social

Researchers in China claim to have made the first ever room-temperature superconductor by compressing an alloy of lanthanum-scandium and the hydrogen-rich material ammonia borane together at pressures of 250–260 GPa. 🧪⚛️ physicsworld.com/a/ternary-hy...

I can't express how damaging this is, music and languages aren't just optional extras, they are at the core of what a university does: cultivate knowledge and culture in the next generation. And if they'll cut those, what's next? It's institutional self-destruction. www.bbc.com/news/article...

bbc.comMusic and modern languages courses suspended at University of NottinghamIn a statement the institution also says it is "proposing to reduce its nursing offer".

And it's not 'just' the arts and humanities, it's truly across the board cuts. Not even "what's next" but what's here right now. This might save a few quid in the short run but in the long run, you're hollowing out the university and destroying your brand. No-one will want to come here.

Tony Padilla #JFT97 Don’t buy the S*n@proftonypadilla.bsky.social

Mathematical Physics MSci at UoN earmarked for closure as mgmt start the cuts. As the custodians of Einstein’s famous blackboard, this is especially worrying. Will we still teach his greatest ideas in years to come? @uonucu.bsky.social @ucu.org.uk

Dr Jared Jeyaretnam ⚛️🧪 reposted

It's not just music and language courses- it's 48 courses across the university. But here's the thing- our UCU colleagues at other universities (like @Cardiffucu.bsky.social) have faced the exact same threats, fought back, and won. So we can too.

I’ve always thought the problem with quantum computers is that they don’t cost nearly enough money (ideally, at least a million dollars per kg!), and should experience heavy vibrations and crushing G-forces after being calibrated. ⚛️🧪

Dr Jared Jeyaretnam ⚛️🧪 reposted

As a theoretical cosmologist, I'm frequently asked "what is the benefit of the work you're doing for people's lives?" Nothing I work on makes money or cures disease. There are a few different answers one can give, at various levels of "convincing" / "actually relevant to why the work is done." 1/🧵