Created by Wenhan Hua on Aug, 22th, 2023
Credit: Pengfei Wang for the idea
- Micromotion affects the lineshape felt by an ion, which makes the doppler cooling inefficient.
- A PHD thesis from Monroe's group metioned an additional laser(named deep cooling laser) is needed to make the ion chain become a crystal.
- Only a 1st-order deep cooling laser is recorded now, the typical freqency is a red-detuned of the micromotion sideband by a few MHz
- According to the PHD thesis from Monroe's group, without deep cooling they are able to load many 10’s of ions, but with deep cooling, they are able to load up to 77 ions in a 3-layer trap.