Single-shot and measurement-based quantum error correction via fault complexes

• URL: http://arxiv.org/abs/2410.12963v1
• Date: Wed, 16 Oct 2024 18:52:24 GMT
• Title: Single-shot and measurement-based quantum error correction via fault complexes
• Authors: Timo Hillmann, Guillaume Dauphinais, Ilan Tzitrin, Michael Vasmer,
• Abstract summary: Photonics provides a viable path to a scalable fault-tolerant quantum computer. Foliation is the construction of fault-tolerant graph states. We introduce the fault complex, a representation of dynamic quantum error correction protocols.
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• Abstract: Photonics provides a viable path to a scalable fault-tolerant quantum computer. The natural framework for this platform is measurement-based quantum computation, where fault-tolerant graph states supersede traditional quantum error-correcting codes. However, the existing formalism for foliation - the construction of fault-tolerant graph states - does not reveal how certain properties, such as single-shot error correction, manifest in the measurement-based setting. We introduce the fault complex, a representation of dynamic quantum error correction protocols particularly well-suited to describe foliation. Our approach enables precise computation of fault tolerance properties of foliated codes and provides insights into circuit-based quantum computation. Analyzing the fault complex leads to improved thresholds for three- and four-dimensional toric codes, a generalization of stability experiments, and the existence of single-shot lattice surgery with higher-dimensional topological codes.

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