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Non-adiabatic holonomies for photonic quantum computing

Version 2 2025-02-04, 15:10
Version 1 2025-02-04, 15:10
Posted on 2025-02-04 - 15:10
One of the most promising nascent technologies, quantum computation faces a major challenge: The need for stable computational building blocks. We present the quantum-optical realization of non-adiabatic holonomies that can be used as single-qubit quantum gates. The hallmark topological protection of non-Abelian geometric phases reduces the need for quantum error correction on a fundamental physical level, while the inherent non-adiabaticity of the structures paves the way for unprecedented miniaturization. To demonstrate their versatility, we realize the Hadamard and Pauli-X gates, experimentally show their non-Abelian nature, and combine them into a single-qubit quantum algorithm, the PQ penny flipover. The planar geometry of such designs enables them to be substituted for the conventional directional coupler meshes currently in wide-spread use in photonic quantum architectures across all platforms.

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Optica Quantum

AUTHORS (7)

Alexander Szameit
Vera Neef
Karo Becker
Matthias Heinrich
Stefan Scheel
Tom Wolterink
Julien Pinske

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