Related papers: Comparison of trapped-ion entangling gate mechanisms for mixed species

Comparison of trapped-ion entangling gate mechanisms for mixed species

URL: http://arxiv.org/abs/2509.17893v1
Date: Mon, 22 Sep 2025 15:25:26 GMT
Title: Comparison of trapped-ion entangling gate mechanisms for mixed species
Authors: V. M. Schäfer, A. C. Hughes, O. Bazavan, K. Thirumalai, G. Pagano, C. J. Ballance, D. M. Lucas,
Abstract summary: We investigate the experimentally relevant differences and commonalities of laser-based $sigma_zotimessigma_z$ light-shift and $sigma_phiotimessigma_phi$ Moelmer-Soerensen gates.<n>We implement these gates on qubits with very different magnetic field sensitivities, encoded in $43mathrmCa+$ and $88mathrmSr+$, achieving fidelities of $99.8%$ for the $sigma_zotimessigma_z
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Entangling gates are an essential capability of quantum computers. There are different methods for implementing two-qubit gates, with respective advantages and disadvantages. We investigate the experimentally relevant differences and commonalities of laser-based $\sigma_z\otimes\sigma_z$ light-shift and $\sigma_\phi\otimes\sigma_\phi$ Moelmer-Soerensen gates, highlighting the phases of experimental control fields and their long-term stabilities, in the specific case of mixed-species gates. We implement these gates on qubits with very different magnetic field sensitivities, encoded in $^{43}\mathrm{Ca}^+$ and $^{88}\mathrm{Sr}^+$, achieving fidelities of $99.8\%$ for the $\sigma_z\otimes\sigma_z$ and $99.6\%$ for the $\sigma_\phi\otimes\sigma_\phi$ gate.

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