Lim Ci Wen Charles Group

Our group research is mainly focused on the theory of quantum communication, quantum cryptography, and quantum correlations. In these topics, we work on the security of quantum cryptography (e.g., quantum key distribution, randomness generation, broadcasting networks, etc) and the foundations of quantum information processing (monogamy of quantum correlations, quantum communication resource theory, etc). 

One of our goals is to produce research work that would accelerate the growth of quantum technology. To this end, we are also interested in developing theoretical toolboxes for experimental quantum optics. 

Currently, we are seeking PhD students and Research Fellows to work on the above topics. Interested applicants are invited to send their CVs and research statements to

More information at our homepage:

Group Members

Recent papers

  • R. Schwonnek , K.T. Goh, I.W. Primaatmaja, Ernest Y.Z. Tan, Ramona Wolf, V. Scarani, C.C.W. Lim. Robust Device-Independent Quantum Key Distribution.
  • Ernest Y.-Z. Tan, C.C.W. Lim, Renato Renner. (2020). Advantage distillation for device-independent quantum key distribution. Phys. Rev. Lett. 124 020502
  • Ernest Y. -Z. Tan, R. Schwonnek , K.T. Goh, I.W. Primaatmaja, C.C.W. Lim. Computing secure key rates for quantum key distribution with untrusted devices.
  • Joseph C. Chapman, C.C.W. Lim, Paul G. Kwiat. Hyperentangled Time-bin and Polarization Quantum Key Distribution.
  • Li Liu, Y. Wang, E. Lavie, A.Ricou, W. Chao, Fen Zhuo Guo, C.C.W. Lim. (2019). Practical quantum key distribution with non-phase-randomized coherent states. Physical Review Applied 12 024048
  • Timo Simnacher, Nikolai Wyderka, R. Schwonnek , Otfried Gühne. (2019). Entanglement detection with scrambled data. Phys. Rev. A 99 062339
  • Yuan-Yuan Zhao, Guo-Yong Xiang, Xiao-Min Hu, Bi-Heng Liu, Chuan-Feng Li, Guang-Can Guo, R. Schwonnek , Ramona Wolf. (2019). Entanglement detection by violations of noisy uncertainty relations: A proof of principle. Phys. Rev. Lett. 122 220401
more preprints > more publications >

We are hiring


Find out more about our PhD Positions on the Join us page.

go to Join Us >