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ETH Zurich Achieves 99.91% Fidelity with New Quantum Gate

4/9/2026

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Summary

Story summary

Researchers at ETH Zurich developed a two-qubit SWAP gate with neutral atoms in optical lattices that uses geometric phases.
This approach is less sensitive to external disturbances than dynamical-phase methods.
The team demonstrated the gate with 99.91% fidelity across over 17,000 atom pairs.
Future work will integrate these gates with quantum gas microscopes for selective qubit manipulation.

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Story summary

Researchers at ETH Zurich developed a two-qubit SWAP gate with neutral atoms in optical lattices that uses geometric phases.
This approach is less sensitive to external disturbances than dynamical-phase methods.
The team demonstrated the gate with 99.91% fidelity across over 17,000 atom pairs.
Future work will integrate these gates with quantum gas microscopes for selective qubit manipulation.