2000 character limit reached
Efficient ground-state cooling of large trapped-ion chains with an EIT tripod scheme (2004.05190v2)
Published 10 Apr 2020 in quant-ph, cond-mat.quant-gas, and physics.atom-ph
Abstract: We report the electromagnetically-induced-transparency (EIT) cooling of a large trapped ${171}$Yb$+$ ion chain to the quantum ground state. Unlike conventional EIT cooling, we engage a four-level tripod structure and achieve fast sub-Doppler cooling over all motional modes. We observe simultaneous ground-state cooling across the complete transverse mode spectrum of up to $40$ ions, occupying a bandwidth of over $3$ MHz. The cooling time is observed to be less than $300\,\mu$s, independent of the number of ions. Such efficient cooling across the entire spectrum is essential for high-fidelity quantum operations using trapped ion crystals for quantum simulators or quantum computers.