We propose fault-tolerant encoders for quantum low-density parity check (LDPC) codes. By grouping qubits within a quantum code over contiguous blocks and applying preshared entanglement across these blocks, we show how transversal implementation can be realized. The proposed encoder reduces the error propagation while using multi-qubit gates and is applicable for both entanglement-unassisted and entanglement-assisted quantum LDPC codes.

翻译：本文提出面向量子低密度奇偶校验（LDPC）码的容错编码器。通过将量子码中的量子比特分组到连续区块，并跨区块应用预共享纠缠，我们展示了如何实现横向实现。该编码器在使用多量子比特门时减少了错误传播，并适用于无纠缠辅助和纠缠辅助的量子LDPC码。