A fiber array architecture for atom quantum computing.

Area of Science:

• Quantum Computing
• Atomic Physics
• Optical Systems

Background:

• Scalable quantum computing relies on precise individual qubit control.
• Current neutral atom processors face challenges in high-rate, parallel gate operations.
• Existing control schemes like atom shuttling or beam scanning have limitations.

Purpose of the Study:

• To propose and experimentally demonstrate a novel fiber array architecture for neutral atom quantum computing.
• To achieve fully independent control of individual atoms in an array.
• To enable time-efficient execution of quantum algorithms.

Main Methods:

• Utilizing a fiber array where each optical waveguide emits trapping and addressing lasers for individual atoms.
• Implementing common-mode suppression of beam pointing noise for robust control.
• Experimentally trapping and controlling ten single atoms in a 2D optical tweezer array.

Main Results:

• Demonstrated individually addressed single-qubit gates with an average fidelity of 0.9966(3).
• Achieved simultaneous arbitrary single-qubit gates on four randomly selected qubits with an average fidelity of 0.9961(4).
• Showcased the capability for robust, independent control of multiple qubits.

Conclusions:

• The proposed fiber array architecture offers a scalable solution for neutral atom quantum computing.
• This approach significantly enhances the speed and parallelism of quantum gate operations.
• The technology paves the way for efficient execution of complex quantum algorithms.