Encoding Error Correction in an Integrated Photonic Chip
Hui Zhang, Lingxiao Wan, Stefano Paesani, Anthony Laing, Yuzhi Shi, Hong Nian Cai, Xianshu Luo, Guo‐Qiang Lo, L. C. Kwek, A. Q. Liu · PRX Quantum · 2023
Integrated photonics provides a versatile platform for encoding and processing quantum information.However, the encoded quantum states are sensitive to noise, which limits their capability to perform complicated quantum computations.Here, we use a five-qubit linear cluster state on a silicon photonic chip to implement a quantum error-correction code and demonstrate its capability of identifying and correcting a single-qubit error.The encoded quantum information is reconstructed from a single-qubit error and an average state fidelity of 0.863 ± 0.032 is achieved for different input states.We further extend the scheme to demonstrate a fault-tolerant measurement-based quantum computation (MBQC) on stabilizer formalism that allows us to redo the qubit operation against the failure of the teleportation process.Our work provides a proof-of-concept working prototype of error correction and MBQC in an integrated photonic chip.