Microwave-driven same-species sympathetic cooling for trapped ions

• URL: http://arxiv.org/abs/2607.20292v1
• Date: Wed, 22 Jul 2026 15:40:01 GMT
• Title: Microwave-driven same-species sympathetic cooling for trapped ions
• Abstract summary: We propose a scheme for sympathetic cooling using the same species and test it for $43$Ca$+$ ions.<n>We benchmark an induced error on the data qubit of $1.7(4)times 10-4$ per cooling cycle.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Sympathetic cooling of data qubits by coolant ions is an essential technique for trapped-ion quantum computing. Conventionally a second ion species is used, requiring additional lasers and complicating optical setups. We propose a scheme for sympathetic cooling using the same species and test it for $^{43}$Ca$^+$ ions. Pulsed sideband cooling and ion addressing are implemented via integrated microwave control, further simplifying optical requirements. We cool a two-ion gate mode close to its ground state ($\bar{n}\approx 0.16$) and benchmark an induced error on the data qubit of $1.7(4)\times 10^{-4}$ per cooling cycle.

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