Sub-Doppler Cavity Cooling Beyond The Lamb-Dicke Limit
Boon Leng Chuah, Nicholas C. Lewty, Radu Cazan, and Murray D. Barrett
TL;DR
This paper demonstrates cavity cooling of a single ion beyond the Lamb-Dicke limit, achieving a significant reduction in temperature and analyzing photon emission statistics to estimate ion temperature in real-time.
Contribution
It presents the first experimental demonstration of sub-Doppler cavity cooling beyond the Lamb-Dicke regime and introduces a model linking phonon and photon states for temperature estimation.
Findings
Achieved approximately 50% of Doppler temperature cooling limit.
Observed super-Poissonian photon distribution in ion-cavity emission.
Proposed real-time ion temperature estimation method based on photon statistics.
Abstract
We investigate the dynamics of cavity cooling of a single ion beyond the Lamb-Dicke regime and demonstrate a cooling limit of approximately 50% of the Doppler temperature using a high finesse cavity for the first time. We also study the statistical properties of the ion-cavity emission and present a model that maps the phonon states to the photon states. With this model, we explain the super-Poissonian photon distribution observed in our experiments and propose a method to estimate the ion temperature in a real-time manner based on the statistical behavior of the photon emission from the cavity.
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