Yingkai Ouyang

Dr. Yingkai Ouyang is a Research Fellow at the School of Mathematical and Physical Sciences, University of Sheffield since 2023, supported by an EPSRC Quantum Technologies Fellowship. His research focuses on quantum error correction, quantum metrology, and quantum cryptography. He earned a PhD in Combinatorics and Optimization from the University of Waterloo (advised by Debbie Leung) and a BSc in Physics from Caltech. His work emphasizes bespoke quantum error correction codes tailored to physical constraints, such as permutation-invariant codes for quantum sensors and ferromagnetic systems. He leads the Ouyang Group, collaborating on fault-tolerant quantum technologies, including quantum bus implementations and robust metrology protocols.

• Education: PhD (University of Waterloo), BSc (Caltech)
• Key Collaborations: UK Quantum Computing Hub, EPSRC-funded projects

Research interests span quantum error correction (e.g., permutation-invariant codes, amplitude damping), quantum metrology (multiparameter estimation, robust probe states), and quantum cryptography (homomorphic encryption). His group integrates theoretical frameworks with experimental needs, leveraging optimization theory and coding techniques. Recent work explores quantum storage in ferromagnets and low-overhead quantum computation via code-switching.

Articles emphasize advancements in quantum error correction algorithms, metrology precision, and cryptographic security. Collaborations aim to bridge theory and practice, targeting near-term quantum devices.