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Linear-optical quantum computation with arbitrary error-correcting codes

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arxiv 2408.04126 v3 pith:GASO2VEN submitted 2024-08-07 quant-ph

classification quant-ph
keywords codesquantumarbitrarylinear-opticalsurfacearchitecturebetterbias
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High-rate quantum error correcting codes mitigate the imposing scale of fault-tolerant quantum computers but require efficient generation of non-local, many-body entanglement. We provide a linear-optical architecture with these properties, compatible with arbitrary codes and Gottesman-Kitaev-Preskill qubits on generic lattices, and featuring a natural way to leverage physical noise bias. Simulations of hyperbolic surface codes and bivariate bicycle codes, promising families of quantum low-density parity-check codes, reveal a threshold comparable to the 2D surface code with substantially better encoding rates.

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