A new method to cool charged partcles in a paul trap

Lijun Du, Y.S. Meng, Jinshu Lu +3 more

张广才, 张洪钧

We propose a simple feedback cooling method, including both the component feedback and the velocity feedback,for cooling a charged particle pair in a Paul trap. It is found that the system can be cooled to periodic orbits;and if control intensity is strong, the system can be cooled to a one-periodic orbit, which is only in a horizontalplane. The result shows that the cooled system is also robust for noise.

Guangcai Zhang, Jing-Ling Shen, Jian-Hua Dai +1 more

Martina Knoop, J. Rink, M. Vedel +1 more

Lorenzo Dania, Dmitry S. Bykov, Matthias Samuel Günter Knoll +2 more

All three motional modes of a charged dielectric nanoparticle in a Paul trap are cooled by direct feedback to temperatures of a few mK. We test two methods, one based on electrical forces and the other on optical forces; for both methods, we find similar cooling efficiencies. Cooling is characterized for both feedback forces as a function of feedback parameters, background pressure, and the particle’s position.

В. И. Савичев, R. Blümel