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Miles S

@mstoud.bsky.social

Researcher at Flatiron Institute. Methods for solving high-dimensional problems, tensor networks, and the ITensor software.

26 Posts156 Follower66 Folgt
Dulwich Quantum Computing@dulwichquantum.bsky.social · 6mo ago

What was that famous Feynman quote again? "Nature isn't classical, dammit, and if you want to make a simulation of nature, you'd better... oh, wait a second... just ask Garnet Chan and he'll simulate it for you on a classical computer!"

Michal Krompiec@mkrompiec.bsky.social · 6mo ago

A breakthrough in comp chem! Jiace Sun and Garnet Chan from Caltech developed stochastic tensor contraction and applied it to CCSD(T), achieving a 2.5-32x speedup relative to DLPNO, with ~4x higher accuracy (the latter does not seem to degrade with system size). arxiv.org/abs/2602.17158 ⚛️🧪

Sean Carroll@seanmcarroll.bsky.social · 10mo ago

But the real fun thing in my quantum class today is that all the students came in costume ... as me. They are the best.

Students in Quantum Mechanics I at Johns Hopkins, all dressed in costume as their professor.
Sean Carroll@seanmcarroll.bsky.social · 10mo ago

And today in #QM1 we continued with the raising/lowering operators, as well as some miscellaneous Fun Facts about the simple harmonic oscillator. Energy eigenstates aren't classical but still carry a memory of the time-averaged probability distribution of a classical oscillator...

Sean Carroll@seanmcarroll.bsky.social · 11mo ago

We also found energy eigenstates for a free particle and the infinite square well. The former are continuous, while the latter are discrete, which is a crucial lesson. QM doesn’t say that Nature is discrete, only that certain observables have a discrete spectrum.

Dulwich Quantum Computing@dulwichquantum.bsky.social · last yr.

This is not quantum-related but the parallels with quantum computing are uncanny: a company has declared that it has resurrected an extinct species from the last ice age, but all they actually did was change 14 genes of the grey wolf's DNA. 🧵 www.theguardian.com/commentisfre...

Have researchers really ‘de-extincted’ the dire wolf? No, but behind the hype was a genuine breakthrough | Helen Pilcher

The pups are cute – and great for PR – but they’re modified grey wolves. The real work is being done with their red cousins, says science writer Helen Pilcher

theguardian.com

Miles S@mstoud.bsky.social · last yr.

In a new preprint arxiv.org/abs/2503.05693, led by Joseph Tindall and Antonio Mello at Flatiron CCQ, we simulate annealing of disordered quantum magnets 🧲 ⌛ and in many cases find better accuracy than recent results from D-Wave devices and leading classical methods (c.f. arxiv.org/abs/2403.00910).

Dynamics of disordered quantum systems with two- and three-dimensional tensor networks

Quantum spin glasses form a good testbed for studying the performance of various quantum annealing and optimization algorithms. In this work we show how two- and three-dimensional tensor networks can ...

arxiv.org