Rutvij Bhavsar is a Research Associate in the Department of Mathematics at King's College London, working with Professor Roger Colbeck on Quantum Information Theory and Quantum Cryptography. His research focuses on translating foundational aspects of quantum theory into practical applications, in particular developing highly secure cryptographic protocols based on Bell non-locality.

Rutvij joined King’s College London after a postdoctoral appointment at the Korea Advanced Institute of Science and Technology (KAIST), where he was a member of the QIT@KAIST laboratory. He completed his PhD in Mathematics at the University of York, following an MSc from Imperial College London and a BS from the Indian Institute of Technology, Kanpur.

 

Research interests

• Quantum information theory
• Device-independent quantum cryptography
• Bell non-locality and quantum foundations
• Theoretical aspects of security of quantum cryptographic protocols
• Developing new protocols of randomness generation, quantum key distribution and state certification.

 

Selected Publications

• Bhavsar, R., Wooltorton, L., & Bae, J. (2025). Composable Framework for Device-Independent State Certification. PRX Quantum, 6, 040356. DOI: 10.1103/1j5f-qjhx.
• Bhavsar, R., Ragi, S., & Colbeck, R. (2023). Improved Device-Independent Randomness Expansion Rates Using Two-Sided Randomness. New Journal of Physics, 25, 093035. DOI: 10.1088/1367-2630/acf5d6