Category: Atoms and Molecules

The Advent Calendar of Physics: Schrödinger

Newton’s birthday (in the Julian calendar) is Sunday, so we’re in the final days of the advent calendar. Which means it’s time for the equations that are least like anything Newton did, such as today’s: This is the Schrödinger equation from non-relativistic quantum mechanics. If you want to determine the quantum state of an object… Continue reading The Advent Calendar of Physics: Schrödinger

The Advent Calendar of Physics: Hydrogen

Today’s equation in our march to Newton’s birthday is actually a tiny bit out of order, historically speaking: This is the Rydberg formula for the wavelengths of the spectral lines in hydrogen (and hydrogen-like ions), with R a constant having the appropriate units, and the two n‘s being two dimensionless integers. This equation was developed… Continue reading The Advent Calendar of Physics: Hydrogen

The Physics of Frustration: “Quantum Simulation of Frustrated Classical Magnetism in Triangular Optical Lattices”

One of the benefits of having joined AAAS in order to get a reduced registration fee at their meeting is that I now have online access to Science at home. Including the Science Express advance online papers, which I don’t usually get on campus. Which means that I get the chance to talk about the… Continue reading The Physics of Frustration: “Quantum Simulation of Frustrated Classical Magnetism in Triangular Optical Lattices”

It’s Magnetic Moment Season: Measuring Various g-Factors

Among the articles highlighted in this week’s Physics is one about a new test of QED through a measurement of the g-factor of the electron in silicon ions. This comes on the heels of a measurement of proton spin flips (this includes a free PDF) a couple of weeks ago, and those, in turn, build… Continue reading It’s Magnetic Moment Season: Measuring Various g-Factors

What’s So Interesting About Precision Measurement?

The final content area from my DAMOP overview is Precision Measurement. This is also the smallest area, with only one invited session on the topic on Fundamental Symmetry Tests, though two of the “Hot Topics” talks (by Zheng-Tian Lu and Ed Hinds) were precision measurement talks. You might be able to make an argument that… Continue reading What’s So Interesting About Precision Measurement?

What’s So Interesting About “Traditional” AMO Physics?

The fourth content area from my whirlwind overview of DAMOP is “traditional” AMO physics. This was the hardest to talk about in my talk, because I know it the least well, but ironically, that makes it really easy to write up here, because I don’t have much to say about it. Where the other areas… Continue reading What’s So Interesting About “Traditional” AMO Physics?

What’s So Interesting About Quantum Phenomena?

Third of the five research categories within DAMOP that I talked about is Quantum Phenomena. This is a little bit of a catch-all, as there are a few different things going on in this area. They are all unified, though, by the fact that they end up making quantum mechanical effects manifest in some way,… Continue reading What’s So Interesting About Quantum Phenomena?

What’s So Interesting About Extreme Lasers?

The second in the DAMOP research categories I talked about is “Extreme Lasers,” a name I was somewhat hesitant to use, as every time I see “Extreme [noun],” I get a flash of Stephen Colbert doing air guitar. It is, however, the appropriate term, because these laser systems push the limits of what’s possible both… Continue reading What’s So Interesting About Extreme Lasers?

What’s So Interesting About Ultracold Matter?

The first of the five categories of active research at DAMOP that I described in yesterday’s post is “Ultracold Matter.” The starting point for this category of research is laser cooling to get a gas of atoms down to microkelvin temperatures (that is, a few millionths of a degree above absolute zero. Evaporative cooling can… Continue reading What’s So Interesting About Ultracold Matter?