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Interleaving: Modular architectures for fault-tolerant photonic quantum computing

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Proposes the interleaving technique for photonic quantum computing, enabling fault-tolerant computation by weaving together small entangled resource states into a topological code using only local fusion operations and classical feedforward. Key enabling architecture for PsiQuantum-style photonic quantum computers.

Key Results

  • Interleaving reduces hardware requirements by reusing optical components across time steps
  • Compatible with ballistic (non-adaptive) photonic circuits
  • Thresholds comparable to bulk topological codes when combined with fusion-based approaches

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