|Filed Under:||Academics / Physics|
|Posts on Regator:||639|
|Posts / Week:||2.1|
|Archived Since:||December 12, 2008|
The quality of Wikipedia entries about mathematics is often quite good, but unfortunately the same cannot be said for their entries about physics. I happened to take a look today at the Wikipedia entry for Multiverse, which is an outrageously … Continue reading ?
It seems to be too early for April Fool’s day, and yet the arXiv has Dark Matter as a Trigger for Periodic Comet Impacts by Lisa Randall and Matt Reece, a preprint described as “Accepted by Physical Review Letters, 4 … Continue reading ?
I’m delighted to see Jester back in action, providing great material on the current state of HEP physics, with, over the past week and a half: A sober look at the sparse prospects for near-term (i.e. 2014) input from experiment, … Continue reading ?
In recent years Leonard Susskind has been giving an excellent series of lectures on basic ideas of theoretical physics, under the title The Theoretical Minimum. The general idea seems to be to provide something in between the usual sort of … Continue reading ?
First, a couple of examples of recent progress in mathematics Terry Tao has some new ideas about the Navier-Stokes equation. See his blog here, a paper here, and a story by Erica Klarreich at Quanta here. I’ve been hoping to … Continue reading ?
Laurence Yaffe has gathered some information about DOE funding of US HEP theory groups, showing sharp drops (average 23%) in such funding for groups reviewed in FY2013 and FY2014. These drops imply serious reductions in the numbers of theory graduate … Continue reading ?
Yes, this multiverse business is tedious, but since it is becoming mainstream physics, with colloquium talks here at Columbia devoted to it, and the Columbia University Press publishing books about it, seems to me that someone at Columbia should be … Continue reading ?
First some links to interesting things: There’s a fascinating interview with Deligne in the latest AMS Notices. Alexandre Grothendieck: A Mathematical Portrait includes some great expository pieces about the mathematics developed by Grothendieck. There’s also available Grothendieck’s own Esquisse Thématique, … Continue reading ?
Sometimes when I have come across claims of exotic phenomena at the far-out edge of the field of BSM physics based on branes and string theory (like time travel, or brane-world explanations of the bad OPERA result), my initial reaction … Continue reading ?
Cosmologist Pedro Ferreira has a new book about to come out, entitled The Perfect Theory. The author accurately describes the book as a “biography of general relativity”, and it’s quite a good one, of the short and breezy variety (as … Continue reading ?
I’ve always thought more philosophers of science should be weighing in on the debate over “falsifiability” and the “demarcation problem” surrounding string theory and the multiverse (i.e. are these really science?). This is a complex and tricky subject that they … Continue reading ?
A few days ago I tried to stop by the Barnes and Noble store here in New York at Fifth Ave. and 18th St., just to find that it had closed earlier this month. This was the first book store … Continue reading ?
I just found out about a new film coming out this spring, which appears to exemplify exactly the dangers I was pointing to in my last posting. It’s entitled The Principle, and features physicists Michio Kaku, Lawrence Krauss and Max … Continue reading ?
Max Tegmark seems to have decided that my criticism here of the emptiness of ideas in his recent book is “similar to hate-mail I’ve been receiving from a Young-Earth Creationist”. Also, the fact that I have fans at a certain … Continue reading ?
After spending two hours in the middle of the day hearing about unexpected uses of twistors to study particle scattering amplitudes, yesterday I went down to Manhattan’s relatively new Museum of Mathematics, which had scheduled a “Family Friday” event, featuring … Continue reading ?
Yesterday Nima Arkani-Hamed was here at Columbia, giving a theory seminar on the topic of the Amplituhedron, which is a characterization of the integration region in a calculation of scattering amplitudes by integrating over regions in the so-called positive Grassmannian. … Continue reading ?
The people at SLAC for a long time have been compiling “Topcites” data which includes various lists of the most heavily-cited papers in HEP. From 1997-2003 Mike Peskin each year would write something about the significance of the lists. I … Continue reading ?
One question I’ve been wondering about for the last 20 years or so has been what SUSY proponents would do when the LHC finally gathered data and found no SUSY. Would they finally admit this was an idea that hadn’t … Continue reading...
Max Tegmark has a new book out, entitled Our Mathematical Universe, which is getting a lot of attention. I’ve written a review of the book for the Wall Street Journal, which is now available (although now behind a paywall, if … Continue reading ?
Every year John Brockman’s Edge web-site hosts responses to a different question. This year the question was What scientific idea is ready for retirement?. It shouldn’t be too hard to guess what I chose to write about, with results available … Continue reading ?