In the reader request thread, Brad asks about superconductors: Why is a room temperature superconductor so hard? Why do things have to be cold for there to be no resistance (I can guess, but my knowledge of super conductors consists of the words “Cooper pairs” which does not get me very far.) Since next year… Continue reading How Do Superconductors Work?
Category: Condensed Matter
Reader Request: Quantum Complexity
There’s some good stuff in yesterday’s post asking what physics you’d like to read more about. I’m nursing a sore neck and shoulder, so I’ll only do one or two quick ones today, starting with James D. Miller in the first comment: 1) Is it true that our understanding of quantum physics comes from studying… Continue reading Reader Request: Quantum Complexity
Measuring Temperature by Counting Atoms: “Suppressed Fluctuations in Fermi Gases”
When one of the most recent issues of Physical Review Letters hit my inbox, I immediately flagged these two papers as something to write up for ResearchBlogging. This I looked at the accompanying viewpoint in Physics, and discovered that Chris Westbrook already did most of the work for me. And, as a bonus, you can… Continue reading Measuring Temperature by Counting Atoms: “Suppressed Fluctuations in Fermi Gases”
Electron Spin for Toddlers
The subject of the “spin” of the electron comes up again and again, so as pointed out in a comment, I really ought to do a post explaining what it is and how it works. As a bonus, this gives me the opportunity to do the dorkiest thing anyone has ever done with a cute-toddler… Continue reading Electron Spin for Toddlers
What’s a Topological Insulator?
Yesterday’s post about how nobody cares about condensed matter physics produced a surprising number of comments of the form “I was really hoping you would post about topological insulators,” which surprised me a bit. Anyway, since people asked for it, I’ll give it a shot. The important caveats here are that 1) this isn’t my… Continue reading What’s a Topological Insulator?
How Do You Make People Care About Topological Insulators?
I had planned to spend some time this weekend trying to make sense of this new result on topological insulators, and maybe even write up the relevant paper for ResearchBlogging. Family life intervened, though, and I didn’t have the time. I get enough of it to understand the basics of what’s going on, but there’s… Continue reading How Do You Make People Care About Topological Insulators?
Holy Grails of Science
With the rumors of a Higgs Boson detected at Fermilab now getting the sort of official denial that in politics would mean the rumors were about to be confirmed in spectacular fashion, it’s looking like we’ll have to wait a little while longer before the next “Holy Grail” of physics gets discovered. Strictly speaking, the… Continue reading Holy Grails of Science
Watching Individual Atoms Make a Phase Transition
A press release from Harvard caught my eye last week, announcing results from Markus Greiner’s group that were, according to the release, published in Science. The press release seems to have gotten the date wrong, though– the article didn’t appear in Science last week. It is, however, available on the arxiv, so you get the… Continue reading Watching Individual Atoms Make a Phase Transition
Dropping Bose Condensates for Fun and Science
An experiment in Germany has generated a good deal of publicity by dropping their Bose-Einstein Cendensate (BEC) apparatus from a 146 meter tower. This wasn’t an act of frustration by an enraged graduate student (anybody who has worked with BEC has probably fantasized about throwing at least part of their apparatus down a deep hole),… Continue reading Dropping Bose Condensates for Fun and Science
Laser Smackdown: Final Days of Voting for the Most Amazing Laser Application
We’re just over 600 votes in the Laser Smackdown poll in honor of the 50th anniversary of the laser, as of early Friday morning. I notice that it has moved off the front page of the blog, though, so here’s another signal-boosting repost, just so we have as many votes as possible, to establish maximum… Continue reading Laser Smackdown: Final Days of Voting for the Most Amazing Laser Application