Encoding error correction in an integrated photonic chip

• Main Authors: Zhang, Hui, Wan, Lingxiao, Paesani, Stefano, Laing, Anthony, Shi, Yuzhi, Cai, Hong, Luo, Xianshu, Lo, Guo-Qiang, Kwek, Leong Chuan, Liu, Ai Qun
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2024
• Subjects: Engineering::Electrical and electronic engineering; Errors Correction; Integrated Photonics
• Online Access: https://hdl.handle.net/10356/173176
• Institution: Nanyang Technological University

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.