Lightnews — Scholar-powered news

Dr Jared Jeyaretnam ⚛️🧪

@jaredjeya.github.io

760 followers 450 following 250 posts

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 (still a WIP!) PS: All opinions solely my own.

Posts Media Videos Starter Packs

Pinned

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · May 21

Our article was featured in Communications Physics!

Communications Physics @commsphys.nature.com · May 15

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

Hilbert space fragmentation at the origin of disorder-free localization in the lattice Schwinger model

Communications Physics - Quantum electrodynamics on a one-dimensional lattice can lead to the localization of charges, in contrast to the thermalizing dynamics ubiquitous in nature. In this work...

rdcu.be

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 6d

Yeah, you’re right about that. I just imagine it’ll pop out somewhere and don’t worry too much about it since I’m not in the business of quantum foundations! 😅

Like generally my interpretation of QM won’t affect my interpretation of the phenomena I work with.

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 6d

Well now you have to call it Bai’s Rule, right?

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 6d

All praise Julia 🙌

Reposted by Dr Jared Jeyaretnam ⚛️🧪

Katie Mack @astrokatie.com · 8d

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/🧵

53 260 1.1K

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 6d

And practically, this looks exactly like the Copenhagen interpretation, because you can’t perform a measurement external to the universe - in exactly the same way that subsystems of entangled pure states look mixed. So this is more like my headcanon for why the Copenhagen interpretation holds :)

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 6d

Well, that comes from when *you* are the external DoFs interacting with the system (usually indirectly via a measuring device).

That is MWI, but I personally just hate the framing of it as “many worlds” since that sounds fantastical. It’s just the natural consequence of rejecting collapse!

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 6d

An interaction with something external to your system. After you trace out the external degrees of freedom, it looks a lot like a measurement.

Reposted by Dr Jared Jeyaretnam ⚛️🧪

Tony Padilla #JFT97 Don’t buy the S*n @proftonypadilla.bsky.social · 14d

Dear students, unless UoN commits to rule out compulsory redundancies, I expect my Principles of Dynamics lectures to be affected by @uonucu.bsky.social industrial action next week. I was gonna tell you by email but the uni says we can’t. If you see this, pls let other students know

3 2 11

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 15d

Just finished the final day of the Nottingham Workshop on Quantum Non-Equilibrium Dynamics!! Lots of great talks, and great discussions too 😄

A photo of one of the talks. People are sitting in chairs watching someone present a talk, specifically Mark Mitchison (KCL) on the topic of process tensors.

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 21d

I would cry if Wes Streeting became PM. Genuinely one of the most awful people in the Labour Party.

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 21d

We once had to rewrite a manuscript *after submission* because we discovered a Hamiltonian we took verbatim from a published paper had an error in its derivation! So I feel you 😅

Luckily after rerunning our numerics our results didn’t change qualitatively, so it wasn’t a complete disaster

Reposted by Dr Jared Jeyaretnam ⚛️🧪

University of Nottingham UCU branch @uonucu.bsky.social · 22d

We have made it clear from the beginning: our industrial action ends as soon as the university agrees to no compulsory redundancies.

This is a demand that the university takes on the responsibility and consequences of their poor financial decisions without putting it on us.

1 3 1

Reposted by Dr Jared Jeyaretnam ⚛️🧪

University of Nottingham UCU branch @uonucu.bsky.social · 22d

After hearing this news, UCU branch representatives reached out to the university again demanding that compulsory redundancies for our members be suspended. They declined to remove this threat.

1 1 1

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 21d

It’s a really dire situation in UK academia.

Here at Nottingham, we’re being told to expect 20% cuts across the board. All because the university mismanaged its money: spending millions on a new campus without a plan, that now has to be sold! And now they want £50m more for a new medical building.

David Ho @davidho.bsky.social · 21d

Wow, physics, which explains how the world works.

Quarter of UK university physics departments at risk of closing, survey finds

Four out of five making staff cuts as physicists say findings are ‘great concern’ for UK’s leadership in important areas

www.theguardian.com

1 1 2

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 22d

Check out my brand new handle 😎

By the way, this was literally as easy as uploading a single text file to my website (and making it publicly available).

A simple guide: lucacozzuto.medium.com/how-to-use-g...

How to use GitHub to be verified on Bluesky

Like many scientists, I joined Buesky since X (former Twitter) is becoming a horrible place. Here you don’t need to pay the platform to be…

lucacozzuto.medium.com

Reposted by Dr Jared Jeyaretnam ⚛️🧪

University of Nottingham UCU branch @uonucu.bsky.social · 23d

If you want to know more about our strike action, you can find it here:
www.canva.com/design/DAGzC...

www.canva.com

1 2 2

Reposted by Dr Jared Jeyaretnam ⚛️🧪

University of Nottingham UCU branch @uonucu.bsky.social · 26d

Strike action is ON!!!

Next week will be the first of 4 weeks of striking from our members as we continue to say NO to the compulsory redundancies forced on us by the university for their poor financial choices.

#StopTheCuts #SaveHE

3 23 41

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · 22d

Good news. The Royal Society has disgraced itself by keeping one of the most evil people in the world among its ranks.

(In case you need reminding, it's estimated his cuts to USAID had ALREADY killed hundreds of thousands of people by July, and will kill 14 million by 2030)

James Ball @jamesrball.com · 24d

Mini-scoop: After resisting pressure to strip Elon Musk of his fellowship for months, the Royal Society is meeting on 1 October to discuss his removal – following his decision to address Tommy Robinson's far-right rally on Saturday.

www.thenewworld.co.uk/james-ball-r...

Royal Society to debate throwing out Elon Musk

One of the most prestigious scientific bodies in the world is considering expelling Musk after his appearance at Tommy Robinson’s extremist London rally

www.thenewworld.co.uk

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · Sep 10

Isn’t Trump proposing a 100% budget cut to climate and earth science? I don’t see how he thinks he can “work within” that.

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · Sep 10

The British Isles, according to the New York Times.

(I think some of my old colleagues from Leeds might have an aneurysm if they see this!)

A screenshot from a New York Times article:

"I have great sympathy for the police," said Paul Wragg, a professor of media law at the University of Leeds, north of London. He said that the public would likely be…”

An outline map of the British Isles. London is labelled, and every other part is labelled relative to London: for example, Wales is “West of London”, Scotland is “far north of London”, and Ireland is “Far west of London”

2 3

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · Aug 14

Students don’t pay the higher fees at university and only pay it back in full if they earn a lot. Raising fees would be akin to increasing grad tax on only the most successful grads - the ones who currently pay off their loans. So affordability doesn’t really come into it, except psychologically.

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · Aug 14

Perhaps we don’t need to understand finances as well as experts, but we do need to understand the basics so we can call management out when they use BS justifications for cuts, or what the best policies for universities are & how to lobby MPs for them!

Dr Jared Jeyaretnam ⚛️🧪 @jaredjeya.github.io · Aug 14

Congratulations! It’s a great feeling :)

Reposted by Dr Jared Jeyaretnam ⚛️🧪

Dulwich Quantum Computing @dulwichquantum.bsky.social · Aug 13

"My bold prediction? Scholar gets the axe within 5 years. Google will announce it with 12 months' notice, Bluesky will have a collective meltdown, universities will scramble for alternatives, and research workflows will be in chaos for years."

Hannah Shelley, MLIS (Metadata, Lattes & Impostor Syndrome) @hannahshelley.bsky.social · Aug 13

Since search is dead, how soon do you think Google Scholar is headed for the Google Graveyard? I'm betting it's soon, and academia is NOT prepared

Google Scholar Is Doomed

Academia built entire careers on a free Google service with zero guarantees. What could go wrong?

hannahshelley.neocities.org

2 8

Reposted by Dr Jared Jeyaretnam ⚛️🧪

Error Correction Zoo @eczoo.bsky.social · Aug 10

Tutorials begin at QEC2025 at @yaleqi.bsky.social. Here is an artistic rendition of some famous codes at the Google Quantum AI tutorial.

4 21