I studied gravity.
Email: [email protected]
Twitter: @danintheory
GitHub: @danintheory

Website: danintheory.com
(just redirects back here)

Dan Roberts

I am an AI Fellow at Sequoia Capital and also a Research Affiliate at the Center for Theoretical Physics at MIT. I am currently looking to found a new AI company following the acquisition of my startup Diffeo, where I was Co-Founder and Chief Technology Officer. I also research ways in which the tools and perspectives from theoretical physics can be applied to artificial intelligence.

I am a co-author of The Principles of Deep Learning Theory, co-authored with Sho Yaida, and based on research in collaboration with Boris Hanin. You can buy a copy in print from Amazon, or directly from Cambridge University Press, or download a free draft from the arXiv! If intrigued further, check out my essay: Why is AI hard and Physics simple?

More broadly, I am interested in the interplay between physics and computation. My work in theoretical physics has focused on the relationship between black holes, quantum chaos, computational complexity, randomness, and how the laws of physics are related to fundamental limits of computation.

Rounding out my CV in natural language, previously I was a Principal Researcher at Salesforce, having arrived via the Diffeo acquisition. Before that, I was a Research Scientist at Facebook AI Research in NYC. Even before that, I was a postdoc in the School of Natural Sciences at the Institute for Advanced Study in Princeton, NJ. I completed my Ph.D. at the Center for Theoretical Physics at MIT, funded by a Hertz Foundation Fellowship and the NDSEG. Prior to that, I was a Marshall Scholar in the UK. While there, I read for Part III of the Mathematical Tripos at Cambridge and then studied quantum information at Oxford. In a previous life (undergrad), I worked on invisibility cloaks (metamaterials and transformation optics) with David R. Smith.

My name is very common, so I try my best to publish under more parts of my full name Daniel A. Roberts—which I never go by and which (unfortunately) also happens to be very common.

Artificial Intelligence

As an AI researcher at FAIR, Diffeo, Salesforce, and now at MIT and Sequoia, I have focused on applying tools from theoretical physics to gain insight into machine learning and artificial intelligence. Recently I’ve worked on understanding neural scaling laws, robust learning, stochastic gradient-based optimization, causality, and the large-width expansion for deep learning.

In 2012, I co-founded Diffeo, a startup focused on collaborative machine intelligence. As part of Diffeo Labs, I co-organized a track for the Text Retrieval Conference (TREC) called Knowledge Base Acceleration. In 2019, Diffeo was acquired by Salesforce, which explains why a bunch of these hyperlinks no longer make any sense.

I once tried to apply machine learning to particle physics.

Theoretical Physics

I’m interested in black holes. I’m also interested in quantum information theory. Luckily, via the gauge/gravity duality or holography, these two subjects are intricately tied together.

Some of my work focuses on what happens when something falls into a black hole (in anti-de Sitter space). The black hole will very quickly scramble (but not destroy) the information. Black holes are thermal systems, and this is actually a manifestation of the well-known butterfly effect. We can try to think about this process in terms of its computational complexity, or we can study it as a distinguishing feature of quantum chaos.


Talks on YouTube

A portrayal of what it might look like to watch my talk on YouTube.


Other Writings

  • Thesis – stapled papers + jokes = PhD