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This breakthrough demonstrates that trapped-ion quantum processors can now entangle up to 1000 qubits using global laser control without exponential resource scaling. By solving previous computational complexity limits for systems larger than ~50 ions, this multimode gate synthesis framework establishes a critical threshold for building large-scale, programmable quantum hardware.
Kim and Colleagues Develop Multi-Tone Framework for Multimode Entangling-Gate Synthesis
Entangling up to 1000 trapped ions with precision was previously limited by the escalating complexity of controlling their collective movements. Now, a new numerical framework achieves this using only global laser control, demonstrating that the resources needed do not increase exponentially with ion number. This offers a scalable pathway towards building larger, more programmable quantum processors based on trapped ions.
A new numerical framework for multi-tone gate synthesis directly optimises control fields to achieve desired spin-spin interactions and suppress unwanted entanglement. YingYe Huang at Tsinghua University, and colleagues from Beijing Academy of Quantum Information Sciences and Frontier Science Centre for Quantum Information, have successfully synthesised gates implementing all-to-all and nearest-neighbour interactions in ion chains of up to 1000 ions using only global laser control. The resources needed to maintain high-fidelity interactions do not sharply increase with system size. These findings present multimode gate synthesis as a promising pathway for programmable interaction engineering in future large-scale trapped-ion quantum processors. Multimode entangling…
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