Drive-Through Quantum Gate: Non-Stop Entangling a Mobile Ion Qubit with a Stationary One

• URL: http://arxiv.org/abs/2601.16537v1
• Date: Fri, 23 Jan 2026 08:15:43 GMT
• Title: Drive-Through Quantum Gate: Non-Stop Entangling a Mobile Ion Qubit with a Stationary One
• Abstract summary: A quantum charge-coupled device (QCCD) based on ion shuttling has been considered a promising approach.<n>We propose a novel entangling scheme between a stationary ion qubit and a continuously transported mobile ion.<n>We theoretically demonstrate a gate error on the order of 0.01%, within reach of current technology.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Towards the scalable realization of a quantum computer, a quantum charge-coupled device (QCCD) based on ion shuttling has been considered a promising approach. However, the processes of detaching an ion from an array, reintegrating it, and driving non-uniform motion introduce severe heating, requiring significant time and laser power for re-cooling and stabilization. To mitigate these challenges, we propose a novel entangling scheme between a stationary ion qubit and a continuously transported mobile ion, which remains in uniform motion and minimizes motional heating. We theoretically demonstrate a gate error on the order of 0.01%, within reach of current technology. This approach enables resource-efficient quantum operations and facilitates long-distance entanglement distribution, where stationary trapped-ion arrays serve as memory units and mobile ions act as communication qubits passing beside them. Our results pave the way for an alternative trapped-ion architecture beyond the QCCD paradigm.

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