There was a flurry of stories last week about an arxiv preprint on optical trapping of an ion. Somewhat surprisingly for an arxiv-only paper, it got a write-up in Physics World. While I generally like Physics World, I have to take issue with their description of why this is interesting: In the past, the trapping… Continue reading Trapping Ions With Light
Category: Experiment
Fifty Years of Solutions Finding Problems
2010 marks the 50th anniversary of the invention of the laser. To mark the occasion, the American Physical society has launched LaserFest, which will involve a large number of public events over the next year. The website includes a bunch of cool things explaining the physics of lasers, and a timeline of laser history with… Continue reading Fifty Years of Solutions Finding Problems
How to Make Slow Atoms and Molecules 2
Consider the air around you, which is hopefully at something like “room temperature”– 290-300 K (60-80 F). That temeprature is a measure of the kinetic energy of the moving atoms and molecules making up the gas. At room temperature, the atoms and molecules in the air around you are moving at something close to the… Continue reading How to Make Slow Atoms and Molecules 2
How to Make Slow Atoms and Molecules 1
Consider the air around you, which is hopefully at something like “room temperature”– 290-300 K (60-80 F). That temeprature is a measure of the kinetic energy of the moving atoms and molecules making up the gas. At room temperature, the atoms and molecules in the air around you are moving at something close to the… Continue reading How to Make Slow Atoms and Molecules 1
Eucatastrophe in Physics
Before leaving Austin on Friday, I had lunch with a former student who is currently a graduate student at the University of Texas, working in an experimental AMO physics lab. I got the tour before lunch– I’m a sucker for lab tours– and things were pretty quiet, as they had recently suffered a catastrophic failure… Continue reading Eucatastrophe in Physics
A Lot of Knowledge Is a Dangerous Thing
I was looking at some polling about science over the weekend, and discovered that they helpfully provide an online quiz consisting of the factual questions asked of the general public as part of the survey. Amusingly, one of them is actually more difficult to answer correctly if you know a lot about the field than… Continue reading A Lot of Knowledge Is a Dangerous Thing
Zitterbewegung!
One of the few sad things about the recent American domination of physics (says the American physicist) is that new physical phenomena are now mostly given boring, prosaic American English names. Don’t get me wrong, I like being able to pronounce and interpret new phenomena, but when the pre-WWII era of European dominance faded away,… Continue reading Zitterbewegung!
Bell Labs vs. the LHC
A number of people have commented on this LA Times op-ed by Steve Giddings about what physicists expect to come out of the Large Hadron Collider. It includes a nice list of possible particle physics discoveries plus a few things that will annoy Peter Woit, and also includes the obligatory note about spin-offs: All this… Continue reading Bell Labs vs. the LHC
Controlling Light With Light
“Slow light” is in the news again. The popular descriptions of the process usually leave a lot to be desired, so let’s see if we can’t do a slightly better job of explaining what’s going on. The key idea is using one light beam to control the transmission of another. Let’s say you have a… Continue reading Controlling Light With Light
A Tale of Two Turbos
I spent most of Saturday in the lab, swapping out a turbopump that was starting to die. How could I tell? Well, for one thing, it made an awful noise, even more than usual for a noisy pump. But after it was stopped and unmounted from the chamber, there was a simple test: comparing the… Continue reading A Tale of Two Turbos