Novel quantum charge-coupled device and drive-through gate with trapped ions

Ting Hsu^1,2,3*, Wen-Han Png^1,2,3, Ming-Shien Chang⁴, Guin-Dar Lin^1,2,3

¹Center for Quantum Science and Engineering and Department of Physics, National Taiwan University, Taipei, Taiwan
²Physics Division, National Center for Theoretical Sciences, Taipei, Taiwan
³Trapped-Ion Quantum Computing Laboratory, Hon Hai Research Institute, Taipei, Taiwan
⁴Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan

* Presenter:Ting Hsu, email:tinghsu2718@gmail.com

To pursue scalable quantum computing, the use of a quantum charge-coupled device (QCCD) based on ion shuttling has been explored. However, challenges arise from ion array splitting, merging, and non-uniform motion, causing heating issues and requiring extensive time and laser power for cooling and stabilization. To overcome this, we propose an innovative approach that entangles a stationary ion qubit with a continuously moving one, ensuring uniform motion without heat generation. Theoretical demonstrations show gate errors on the order of 10^-4 with current technology. This novel gate scheme enhances efficiency and cost-effectiveness in quantum operations, enabling long-distance entanglement distribution. Stationary trapped ion arrays act as memory units, while mobile ions serve as information carriers, offering a groundbreaking alternative to the conventional QCCD architecture.

Keywords: Quantum charge-coupled device, Scalable trapped-ion quantum computing, Drive-through gate