Measurement-based ground state cooling of a trapped ion oscillator

• URL: http://arxiv.org/abs/2208.05332v2
• Date: Mon, 30 Jan 2023 12:43:17 GMT
• Title: Measurement-based ground state cooling of a trapped ion oscillator
• Authors: Chungsun Lee, Simon C. Webster, Jacopo Mosca Toba, Ollie Corfield, George Porter, Richard C. Thompson
• Abstract summary: Measurement-based cooling is a method by which a quantum system, initially in a thermal state, can be prepared in its ground state through some sort of measurement. Here we demonstrate the application of a measurement-based cooling technique to a trapped atomic ion.
• Score: 0.45049844614866724
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Measurement-based cooling is a method by which a quantum system, initially in a thermal state, can be prepared in its ground state through some sort of measurement. This is done by making a measurement that heralds the system being in the desired state. Here we demonstrate the application of a measurement-based cooling technique to a trapped atomic ion. The ion is pre-cooled by Doppler laser cooling to a thermal state with a mean excitation of $\bar n \approx 18$ and the measurement-based cooling technique selects those occasions when the ion happens to be in the motional ground state. The fidelity of the heralding process is greater than 95%. This technique can be applied to other systems that are not as amenable to laser cooling as trapped ions.

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