Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions
Judith Elena Jordan, Kevin A. Gilmore, Athreya Shankar, Arghavan Safari-Naini, Justin G. Bohnet, Murray Holland, John J. Bollinger
We study, both experimentally and theoretically, electromagnetically induced transparency cooling of the axial drumhead modes of 2-dimensional arrays with up to N 190 Be+ ions stored in a Penning trap. Substantial sub-Doppler cooling is observed for all N drumhead modes. Quantitative measurements for the center-of-mass mode show near ground state cooling with motional quantum numbers of nbar = 0.3 +- 0.2 obtained within 200 μs. The measured cooling rate is faster than that predicted by single particle theory, in agreement with a quantum many-body calculation. For the lower frequency drumhead modes, quantitative temperature measurements are limited by apparent damping and frequency instabilities, but near ground state cooling of the full bandwidth is stronglysuggested.
, Gilmore, K.
, Shankar, A.
, Safari-Naini, A.
, Bohnet, J.
, Holland, M.
and Bollinger, J.
Near ground-state cooling of two-dimensional trapped-ion crystals with more than 100 ions, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926573
(Accessed September 27, 2022)