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

• URL: http://arxiv.org/abs/2004.05190v2
• Date: Mon, 27 Apr 2020 14:22:07 GMT
• Title: Efficient ground-state cooling of large trapped-ion chains with an EIT tripod scheme
• Authors: L. Feng, W. L. Tan, A. De, A. Menon, A. Chu, G. Pagano, C. Monroe
• Abstract summary: We report the electromagnetically-induced-transparency (EIT) cooling of a large trapped $171$Yb$+$ ion chain to the quantum ground state. We observe simultaneous ground-state cooling across the complete transverse mode spectrum of up to $40$ ions, occupying a bandwidth of over $3$ MHz.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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