Self-Excitation and Feedback Cooling of an Isolated Proton

Details Self-Excitation and Feedback Cooling of an Isolated Proton Self-Excitation and Feedback Cooling of an Isolated Proton

2010-02-03

arxiv.org/abs/1002.0868v2

Physics

Atomic Physics

Scientific paper

The first one-proton self-excited oscillator (SEO) and one-proton feedback cooling are demonstrated. In a Penning trap with a large magnetic gradient, the SEO frequency is resolved to the high precision needed to detect a one-proton spin flip. This is after undamped magnetron motion is sideband-cooled to a 14 mK theoretical limit, and despite random frequency shifts (larger than those from a spin flip) that take place every time sideband cooling is applied in the gradient. The observations open a possible path towards a million-fold improved comparison of the antiproton and proton magnetic moments.

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