Follow this blog on Twitter
- Planck Speaks: Bad News for Primordial Gravitational Waves?
- How Much Cosmic Inflation Probably Occurred?
- Cosmological Attractors
- Norms for Respectful Classroom/Seminar Discussion
- Troublesome Speech and the UIUC Boycott
- Should Scientific Progress Affect Religious Beliefs?
- Effective Field Theory MOOC from MIT
- Single Superfield Inflation: The Trailer
- Cosmosis: A lot of the discussion here is focused on the question of whether there is...
- John Barrett: @JohnD Other experiments that have been set up for finding gravitational...
- bostontola: Let’s hope SPIDER gets aloft in December and is successfully...
- Patriiiiiiiii: Sean, thank you for the awesome articles, your website is always a...
- Simon DeDeo: In my “Research Methods” class (http://bit.ly/iu399) we began...
- JohnD: @John Barrett re “You can’t have gravitational waves that alter the speed...
@seanmcarroll on TwitterMy Tweets
The Particle at the End of the Universe: How the Hunt for the Higgs Boson Leads Us to the Edge of a New World From Eternity to Here: The Quest for the Ultimate Theory of Time Spacetime and Geometry: An Introduction to General Relativity Mysteries of Modern Physics -- Time (The Great Courses) Dark Matter and Dark Energy (The Great Courses)
Category Archives: Science
Ever since we all heard the exciting news that the BICEP2 experiment had detected “B-mode” polarization in the cosmic microwave background — just the kind we would expect to be produced by cosmic inflation at a high energy scale — … Continue reading
Nothing focuses the mind like a hanging, and nothing focuses the science like an unexpected experimental result. The BICEP2 claimed discovery of gravitational waves in the cosmic microwave background — although we still don’t know whether it will hold up … Continue reading
I want to tell you about a paper I recently wrote with grad student Grant Remmen, about how much inflation we should expect to have occurred in the early universe. But that paper leans heavily on an earlier one that … Continue reading
Faithful readers are well aware of the importance of effective field theory in modern physics. EFT provides, in a nutshell, the best way we have to think about the fundamental dynamics of the universe, from the physics underlying everyday life … Continue reading
This is amazing. (Via Bob McNees and Michael Nielsen on Twitter.) Backstory for the puzzled: here is a nice paper that came out last month, on inflation in supergravity. Inflation in Supergravity with a Single Chiral Superfield Sergei V. Ketov, … Continue reading
Greetings from sunny (for the moment) Yorktown Heights, NY, home of IBM’s Watson Research Center. I’m behind on respectable blogging (although it’s been nice to see some substantive conversation on the last couple of comment threads), and I’m at a … Continue reading
Hidden in my papers with Chip Sebens on Everettian quantum mechanics is a simple solution to a fun philosophical problem with potential implications for cosmology: the quantum version of the Sleeping Beauty Problem. It’s a classic example of self-locating uncertainty: … Continue reading
One of the most profound and mysterious principles in all of physics is the Born Rule, named after Max Born. In quantum mechanics, particles don’t have classical properties like “position” or “momentum”; rather, there is a wave function that assigns … Continue reading
Dark matter exists, but there is still a lot we don’t know about it. Presumably it’s some kind of particle, but we don’t know how massive it is, what forces it interacts with, or how it was produced. On the … Continue reading
I have often talked about the Many-Worlds or Everett approach to quantum mechanics — here’s an explanatory video, an excerpt from From Eternity to Here, and slides from a talk. But I don’t think I’ve ever explained as persuasively as … Continue reading