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This research identifies that adhering strictly to minimum geometric spacing rules in neutral-atom processors is insufficient for eliminating residual noise caused by van der Waals interactions. By treating inter-gate spacing as an adjustable design variable, researchers can significantly suppress correlated errors and improve computational reliability without requiring new hardware fabrication. This finding offers a practical software-level optimization pathway to enhance qubit stability within existing device constraints.

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Researchers Link Neutral-Atom Qubit Spacing to Noise Levels

Quantum Zeitgeist21 august 20264 min de cititArticolul și perspectiva sunt în engleză.

Beyond simply meeting minimum qubit separation rules, residual van der Waals interactions continue to introduce noise into neutral atom processors. This work demonstrates how optimising beyond those limits, treating entangling-zone spacing as an adjustable variable impacting both reliability and processing speed, can suppress correlated errors visible even after quantum error correction. Increased spacing alongside recompilation offers a pathway towards improved performance within existing hardware constraints.

Neutral-atom processors conventionally enforce minimum geometric spacing rules for qubit arrays with a finite Rydberg blockade radius of approximately 4.3μm during gate operations. Meeting these separation requirements does not guarantee elimination of residual noise arising from van der Waals interactions between qubits, however modest increases in inter-gate spacing can sharply suppress correlated exposure. Xinyi Li of Stevens Institute of Technology and colleagues found that increasing…

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