text: * [http://hyperphysics.phy-astr.gsu.edu/hbase/optmod/lascool.html Laser Cooling] HyperPhysics
  * PhysicsWorld series of articles by Chad Orzel:
  ** [https://physicsworld.com/a/cold-how-physicists-learned-to-manipulate-and-move-particles-with-laser-cooling/ Cold: how physicists learned to manipulate and move particles with laser cooling]
  ** [https://physicsworld.com/a/colder-how-physicists-beat-the-theoretical-limit-for-laser-cooling-and-laid-the-foundations-for-a-quantum-revolution/ Colder: how physicists beat the theoretical limit for laser cooling and laid the foundations for a quantum revolution]
  ** [https://physicsworld.com/a/coldest-how-a-letter-to-einstein-and-advances-in-laser-cooling-technology-led-physicists-to-new-quantum-states-of-matter/ Coldest: how a letter to Einstein and advances in laser-cooling technology led physicists to new quantum states of matter]