Last week’s post talked about the general idea of negative temperature, with reference to this much-talked-about Science paper (which also comes in a free arxiv version from which the figures used here are taken). I didn’t go into the details of how they made a negative temperature gas, though, and as it’s both very clever… Continue reading How Do You Make Negative Temperatures, Anyway?
Category: Science
What Does “Negative Temperature” Mean, Anyway?
The most talked-about physics paper last week was probably Negative Absolute Temperature for Motional Degrees of Freedom (that link goes to the paywalled journal; there’s also a free arxiv preprint from which the above figure is taken). It’s a catchy but easily misinterpreted title– Negative absolute temperature! Below Absolute Zero! Thermodynamics is wrong!– that obscures… Continue reading What Does “Negative Temperature” Mean, Anyway?
The Psychology and Improbability of Shuffle Play
Kate and I went down to New York City (sans kids, as my parents were good enough to take SteelyKid and The Pip for the weekend) this weekend, because Kate had a case to argue this morning, and I needed a getaway before the start of classes today. We hit the Rubin Museum of Art,… Continue reading The Psychology and Improbability of Shuffle Play
The Physics of Wall Street by James Owen Weatherall
As I hinted obliquely a little while back, I don’t have a terribly high opinion of Wall Street or Wall Street traders. Given that, I’m not the most obvious audience for a book titled The Physics of Wall Street, and truth be told, I wouldn’t’ve picked it up on my own. The publisher sent me… Continue reading The Physics of Wall Street by James Owen Weatherall
Top Physics Breakthroughs of the 13th Baktun
We’re at that time of year where people publish lists of top stories of the year, but as many crazy people will be happy to remind you, this Friday marks the end of another calendrical period, in the Mayan calendar. So, I’m going to steal an idea from a college classmate on Facebook, who wrote:… Continue reading Top Physics Breakthroughs of the 13th Baktun
How to Think Like a Scientist
I have made allusions to a work-in-progress at various points recently, but my general policy is not to reveal any details until things become official. Well, as you can see from the above photo of signed contracts, it’s official: I sold the work-in-progress to Basic Books, my publisher for How to Teach Relativity to Your… Continue reading How to Think Like a Scientist
The Visual Presentation of Misleading Information, Anti-Asian Bias Edition
In which the skewing of a data plot in Ron Unz’s epic investigation of college admissions makes me more skeptical of his overall claim, thanks to the misleading tricks employed. ———— Steve Hsu has a new post on a favorite topic of his, bias against Asians in higher ed admissions. This is based on a… Continue reading The Visual Presentation of Misleading Information, Anti-Asian Bias Edition
Using Light to Put a Mirror in the Dark: “Optomechanical Dark Mode”
In which I unpack a cryptic paper title and explain how quantum superposition lets you use light to keep things from interacting with light. ————- I joined AAAS a couple of years ago to get a break on the registration fee for their meeting, and I’ve kept up the membership mostly because I like having… Continue reading Using Light to Put a Mirror in the Dark: “Optomechanical Dark Mode”
The Inspiring Power of You’re Doing It Wrong
I’ve got a bunch of browser tabs open on my various computers that have been there for weeks, one of which is Alastair Reynolds on writing science fiction. This is mostly a response to a not-terribly-interesting complaint that the science fiction genre has been “exhausted,” but there was a bit in there that resonated with… Continue reading The Inspiring Power of You’re Doing It Wrong
Hobbits and Prime Ministers: The Physics of Doors
Over at Tor.com, Kate has begun a chapter-by-chapter re-read of The Hobbit, and has some thoughts on Chapter 1. It’s full of interesting commentary about characters and literary technique, but let’s get right to the important bit: Physics! Kate mentions in passing in the post that the Hobbit style round door with a knob in… Continue reading Hobbits and Prime Ministers: The Physics of Doors