Yingkai Ouyang
Research Fellow (ECE, NUS)
Marco Tomamichel


  • Ching-Yi Lai, Y. Ouyang. Linear programming bounds for quantum channels acting on quantum error-correcting codes.
  • Y. Ouyang, Cosmo Lupo. Quantum key distribution with non-ideal heterodyne detection.
  • Y. Ouyang, Taro Shibayama. The equivalence between correctability of deletions and insertions of separable states in quantum codes.
  • Y. Ouyang. Permutation-invariant quantum coding for quantum deletion channels.
  • Y. Ouyang, Ramis Movassagh. Constructing quantum codes from any classical code and their embedding in ground space of local Hamiltonians.
  • Earl Campbell, Y. Ouyang. Trade-offs on number and phase shift resilience in bosonic quantum codes.
  • Narayanan Rengaswamy, Y. Ouyang. Weight Distribution of Classical Codes Influences Robust Quantum Metrology.
  • Damian Markham, Nathan Shettell, Y. Ouyang. Robust quantum metrology with explicit symmetric states.


  • Y. Ouyang. (2021). Avoiding coherent errors with rotated concatenated stabilizer codes. NPJ: Quantum Information 7 87
  • Jasminder S. Sidhu, Y. Ouyang, Earl T. Campbell, Pieter Kok. (2021). Tight bounds on the simultaneous estimation of incompatible parameters. Phys. Rev. X 11 011028
  • Bartosz Regula, James R. Seddon, Earl T. Campbell, Y. Ouyang, Hakop Pashayan. (2021). Quantifying quantum speedups: improved classical simulation from tighter magic monotones. PRX Quantum 2 010345
  • Y. Ouyang. (2021). Quantum storage in quantum ferromagnets. Phys. Rev. B 103 144417
  • Rui Chao, Y. Ouyang. (2020). Permutation-invariant constant-excitation quantum codes for amplitude damping. IEEE Transactions on Information Theory 66 2921-2933
  • Lin Chen, Yi Shen, Y. Ouyang. (2020). Faster quantum computation with permutations and resonant couplings. Linear Algebra Appl 592 270-286
  • Earl T. Campbell, David R. White, Y. Ouyang. (2020). Compilation by stochastic Hamiltonian sparsification. Quantum 4 235
  • Peter P. Rohde, Joseph Fitzsimons, Si-Hui Tan, Y. Ouyang. (2020). Homomorphic encryption of linear optics quantum computation on almost arbitrary states of light with asymptotically perfect security. Physical Review Research 2 013332
  • Ching-Yi Lai, Y. Ouyang. (2020). Linear programming bounds for quantum amplitude damping codes. IEEE ISIT 1875-1879
  • Xun-Li Feng, Gangcheng Wang, Chunfeng Wu, Chu Guo, Yimin Wang, Y. Ouyang. (2019). Initializing a permutation-invariant quantum error-correction code. Phys. Rev. A 99 012335
  • Y. Ouyang. (2019). Computing spectral bounds of the Heisenberg ferromagnet from geometric considerations. J. Math. Phys. 60 071901
  • Joseph F. Fitzsimons, V. Vedral, Y. Ouyang, Zhikuan Zhao, Robert Pisarczyk. (2019). Causal limit on quantum communication. Phys. Rev. Lett. 123 150502
  • Peter P. Rohde, Y. Ouyang, Si-Hui Tan. (2018). Practical quantum somewhat-homomorphic encryption with coherent states. Phys. Rev. A 97 042308
  • Joseph F. Fitzsimons, Y. Ouyang, Tommaso F. Demarie. (2018). Classical verification of quantum circuits containing few basis changes. Phys. Rev. A 97 042319
  • Joseph Fitzsimons, Si-Hui Tan, Y. Ouyang. (2018). Quantum homomorphic encryption from quantum codes. Phys. Rev. A 98 042334
  • Y. Ouyang. (2017). Permutation-invariant qudit codes from polynomials. Linear Algebra Appl 532 43-59
  • Y. Ouyang, S. Tan, Liming Zhao, J. Fitzsimons. (2017). Computing on quantum shared secrets. Phys. Rev. A 96 052333
  • Joseph Fitzsimons, Y. Ouyang. (2016). Permutation-invariant codes encoding more than one qubit. Phys. Rev. A 93 042340
  • S. Tan, Joshua A. Kettlewell, Y. Ouyang, Lin Chen, J. Fitzsimons. (2016). A quantum approach to homomorphic encryption. Scientific Reports 6 33467
  • Y. Ouyang. (2014). Concatenated quantum codes can attain the quantum Gilbert-Varshamov bound. IEEE Transactions on Information Theory 60 3117-3122
  • Y. Ouyang. (2014). Channel covariance, twirling, contraction, and some upper bounds on the quantum capacity. Quantum Information and Computation 14 0917-0936
  • Y. Ouyang. (2014). Permutation-invariant quantum codes. Phys. Rev. A 90 062317
  • Wee Hao Ng, Y. Ouyang. (2013). Truncated channel representations for coupled harmonic oscillators. J. Phys. A: Math. Theor. 46 205301