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arXiv · 2406.16684

Deterministic generation of concatenated graph codes from quantum emitters

Love A. Pettersson·Anders S. Sørensen·Stefano Paesani
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Abstract

Photon loss is the dominant noise mechanism in photonic quantum technologies. Designing fault-tolerant schemes with high tolerance to loss is thus a central challenge in scaling photonic quantum information processors. Concatenation of a fault-tolerant construction with a code able to efficiently correct loss is a promising approach to achieve this, but practical ways to implement code concatenation with photons have been lacking. We propose schemes for generating concatenated graph codes using multi-photon emission from two quantum emitters or a single quantum emitter coupled to a memory; capabilities available in several photonic platforms. We show that these schemes enable fault-tolerant fusion-based quantum computation in practical regimes with high photon loss and standard fusion gates without the need for auxiliary photons.

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Love A. Pettersson, Anders S. Sørensen, Stefano Paesani. 2024-06-24. Deterministic generation of concatenated graph codes from quantum emitters. https://arxiv.org/abs/2406.16684

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