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- 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
- Jason: Sean, Any thoughts on the recent Cortês, Liddle, and Parkinson that says (if I...
- Edward: Cheng, Huang and Wang got the new upper bound on r (r<0.083) in 1409.7025...
- 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...
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Monthly Archives: March 2014
Usually, technical advances in mathematical physics don’t generate a lot of news buzz. But last year a story in Quanta proved to be an exception. It relayed the news of an intriguing new way to think about quantum field theory … Continue reading
In the wake of the announcement of gravitational-wave signatures from inflation in the cosmic microwave background, I was invited to contribute a piece to The Stone section of the New York Times, on “naturalness” and how it’s used in physics. … Continue reading
Here I am at an extremely stimulating meeting on gravity and quantum spacetime in Santa Barbara, but I skipped yesterday’s afternoon session to talk on the PBS News Hour about the new inflation results: There’s a great parallel (if the … Continue reading
Here are the main results on gravitational waves/B-modes from the CMB, as reported by the BICEP2 experiment. For background see my previous post. All of the BICEP2 results and plots are here. First, the best fit to r, the ratio … Continue reading
Major announcement coming! [Update: Of course by now the announcement has come, of the discovery of signatures of gravitational waves in the cosmic microwave background by the BICEP2 experiment, more or less as the post below surmised. This follow-up post … Continue reading
Each year, the 14th of March is celebrated by scientifically-minded folks for two good reasons. First, it’s Einstein’s birthday (happy 135th, Albert!). Second, it’s Pi Day, because 3/14 is the closest calendrical approximation we have to the decimal expansion of … Continue reading
The Second Superstring Revolution was, like most revolutions, a somewhat messy affair, with a number of pivotal steps along the way: understanding the role of membranes in 11-dimensional supergravity, the discovery of dualities in supersymmetric gauge theories, Polchinski’s appreciation of … Continue reading
The hunt for dark matter has been heating up once again, driven (as usual) by tantalizing experimental hints. This time the hints are coming mainly from outer space rather than underground laboratories, which makes them harder to check independently, but … Continue reading
Been falling behind on my favorite thing to do on the blog: post summaries of my own research papers. Back in October I submitted a paper with two Caltech colleagues, postdoc Stefan Leichenauer and grad student Jason Pollack, on the … Continue reading