Oh Choo Hiap Group

We are working on quantum information, quantum computation and the related fundamental issues in quantum theory. Our main research fields include:

- Quantum phase factors and their applications in various quantum informational processings, in particular we are interested in the geometrical and topological aspects.

- Characterizing the decoherence and developing efficient ways to correct and suppress the errors induced by decoherence.

- Entanglement and quantum correlations beyond entanglement, such as quantum discord, and quantum nonlocality.

Oh Choo Hiap obtained his BSc (First Class Hons) and PhD in physics in 1969 and 1972, respectively, from the University of Otago, New Zealand. For his PhD, he studied high energy physics, which relates to the study of the smallest constituents of matter. Choo Hiap has been with NUS since 1983, serving as Head of the Physics Department from 2000 to 2006. During this time he recruited various researchers in the field of quantum information, laying the foundation for CQT, of which he is a founding member.  His recent research is mainly on the fundamentals of quantum information science and the multiparticle phenomenology; he is a Fellow od American Physical Society. He was awarded an Emeritus Professorship by NUS in 2016.

Group Members

Recent papers

  • Xin-Wen Wang, S.X. Yu, Deng-Yu Zhang, C.H. Oh. (2016). Effect of weak measurement on entanglement distribution over noisy channels. Scientific Reports 6 22408
  • Ji-Fang Li, Jin-Ming Liu, Xin-Li Feng, C.H. Oh. (2016). Deterministic remote two-qubit state preparation in dissipative environments. Quantum Information Processing 15 2155-2168
  • Kazuo Fujikawa, C.H. Oh, Koichiro Umetsu, S.X. Yu. (2016). Separability criteria with angular and Hilbert space averages. Ann. Phys. 368 248-257
  • Li Dong, Yan-Fang Lin, Jun-Xi Wang, Qing-Yang Li, Hong-Zhi Shen, Hai-Kuan Dong, Yuan-Peng Ren, Xiao-Ming Xiu, Ya-Jun Gao, C.H. Oh. (2016). Nearly deterministic Fredkin gate based on weak cross-Kerr nonlinearities. J. Opt. Soc. Am. B 33 253
  • Li Dong, Jun-Xi Wang, Qing-Yang Li, Hong-Zhi Shen, Hai-Kuan Dong, Xiao-Ming Xiu, Ya-Jun Gao, C.H. Oh. (2016). Nearly deterministic preparation of the perfect W state with weak cross-Kerr nonlinearities. Phys. Rev. A 93 012308
  • C.J. Zhang, S.X. Yu, Q. Chen, H D Yuan, C.H. Lai, C.H. Oh. (2015). Complete condition for nonzero quantum correlation in continuous variable systems. New J. Phys. 17 09307
  • S.X. Yu, Q. Chen, C.H. Oh. (2015). Two infinite families of nonadditive quantum error-correcting codes. IEEE Transactions on Information Theory 61 7012-7016
more publications >