Oil is the most Lovecraftian thing that actually exists. You're telling me that there's a black ichor under the earth made from the ancient dead, whose burning can realize all the dreams of man, but only at the price of slowly returning the earth to its primordial state?

People take for granted the fact that mangos are so delicious, but most don’t know that every logical mango is made out of many physical mangos.

Are you a computer scientist and don't know what an OTOC is, but want to understand the problem solved in the recent Nature paper by Google Quantum AI? We wrote a 2-page note that explains the motivation and presents a simplified version of the problem for any input size. scirate.com/arxiv/2510.1...

This is what courage in the face of authoritarianism looks like. No university should take Trump's bribe & surrender their integrity — bending the knee to a bully only feeds the beast & puts ALL our rights at risk. Others should follows MIT’s example ASAP.

When can we use random unitaries to (efficiently) model physical dynamics? 💻 ⚛️ Excited to share a couple of works with Liang Mao, Fernando Brandão, Robert Huang, Thomas Schuster in which we explore this question! [1] arxiv.org/abs/2510.08448 [2] arxiv.org/abs/2510.08434 1/8

I've complained a couple times about the lack of physics community here but not done much about it! New commitment: I'll post one interesting arXiv paper a day until things are better. (To the folks who follow me for non-physics science policy, don't worry; plenty more of that reporting to come.)

The Ginsburg Center for Quantum Precision Measurement @caltech.edu now stands 4 stories high. Opens summer 2026.

counterpoint: it's fun when academics refuse to write a paper so you see everyone cite a blog post or youtube video instead

How fast can (pseudo)random unitaries be implemented on a quantum computer? O(1) time suffices (provided you can do things like intermediate measurements)! This -and more- is thanks to a superfun collaboration with Ben Foxman, @nat-parham.bsky.social, and @franvasco.bsky.social (all PhD students!).

Useful advice from @nicoleyh11.bsky.social. quantumfrontiers.com/2025/08/10/n...

In exciting new work with Ben Foxman, @nat-parham.bsky.social , and @henryyuen.bsky.social we show that t-designs and pseudorandom unitaries are implementable in constant (quantum) time! arxiv.org/abs/2508.11487

video & comments make some very sharp points ("quantum computers are to classical computers what planes are to cars" @ f5673-t1h) ... but I'm actually more amazed by what she said about modern solar panels 🤯 25% efficiency for commercially available panels in 2025 is crazy

One more day, one more chance to pretend that I understand the word "topological"

What is the min depth you need for a random unitary? In this work w/ Tommy Schuster, @RobertHuangHY, Fernando Brandão (arxiv.org/abs/2507.06216) we glue random unitary blocks w/ only random phases on log n qubits (fns on log n bits) to get designs in d = log k log log n 🧩 1/8

We report that there is something corrosive about this sunrise; acidic orange clouds, biting winds, the light eating houses one after the other. The back wall of our kitchen is about to be swallowed too, all bright and golden. We have to admit that we are not much for mornings.

Not Bullshit