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Researchers Create A Quantum Gate With A Single, Flat Metasurface

Two-qubit controlled gates, such as the controlled-Y gate, are essential building blocks for universal quantum computation. Researchers propose and numerically demonstrate an optical quantum controlled-Y gate based on a single-layer Pancharatnam–Berry gradient metasurface operating at 1550 nm.
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quantumzeitgeist.com broke the news on Monday, September 7, 2026.
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