A look at the cavity quantum electrodynamics work that Serge Haroche pioneered. Dave Winelend, the other physics Nobel winner, does investigations using ion traps.
There’s a number of short videos with Wineland done by the Institute for Quantum Computing — From Atomic Clocks to Ion Traps: David Wineland at IQC
And Chad has a summary up at Uncertain Principles: What’s So Interesting About Single Quantum Systems? Physics Nobel 2012