Efficient ground-state cooling of large trapped-ion chains with an EIT tripod scheme

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.

Main text: 4 pages, 4 figures; Supplement: 4 pages, 5 figures

References in corpus (3)

• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• Electromagnetially-induced-transparency-like ground-state cooling in a double-cavity optomechanical system
• Direct laser cooling to Bose-Einstein condensation in a dipole trap

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• Dark-state sideband cooling in an atomic ensemble
• Systematic study of tunable laser cooling for trapped-ion experiments
• Scalable quantum logic spectroscopy
• Non-invasive measurement of currents in analog quantum simulators
• An open-endcap blade trap for radial-2D ion crystals