Yijia Xu (许逸葭)

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Fault Tolerance researcher at PsiQuantum

Curriculum Vitae

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I am a Quantum Architect at PsiQuantum. I got my PhD from Joint Center for Quantum Information and Computer Science. My research interest is quantum information, quantum error correction, and quantum fault tolerance. For discrete-variable systems, I am interested in homological codes and their fault tolerance. For continuous-variable systems, I am interested in error-correcting codes and their fault-tolerant operations, as well as the theory of approximate error correction. I was fortunate to be advised by Victor V. Albert.

Research interests:

Papers

  1. Yixu Wang, Yijia Xu, Zi-Wen Liu, Approximate quantum error correction theory of non-isometric codes arxiv: 2606.13559
  2. Owen C. Wetherbee, Yijia Xu, Victor V. Albert, Baptiste Royer, Valla Fatemi Bosonic Cyclic Codes: Trading Stabilizers for Gaussian Non-Clifford Phase Gates arxiv: 2606.11010
  3. Yijia Xu, Yixu Wang, Zi-Wen Liu, A framework for low-overhead quantum fault tolerance via spacetime lifting arxiv: 2606.06365
  4. Yijia Xu, Yixu Wang, Christophe Vuillot, and Victor V. Albert, Letting the tiger out of its cage: bosonic coding without concatenation Phys. Rev. X 15, 041025 and talk at QEC 25
  5. Yixu Wang, Yijia Xu (equal contribution), and Zi-Wen Liu, Tessellation codes: Encoded quantum gates by geometric rotation Phys. Rev. Lett. 135, 140602 and talk at QIP 2025
  6. Zijian Liang, Yijia Xu (equal contribution), Joseph T. Iosue and Yu-An Chen, Extracting topological orders of generalized Pauli stabilizer codes in two dimensions PRX Quantum 5, 030328
  7. Yijia Xu, Yixu Wang (equal contribution), and Victor V. Albert, Clifford operations and homological codes for rotors and oscillators Phys. Rev. A 110, 022402 and talk at TQC 2024
  8. Yu-An Chen, Alexey V. Gorshkov, and Yijia Xu (alphabetical order), Error-correcting codes for fermionic quantum simulation SciPost Phys. 16, 033 (2024)
  9. Yijia Xu, Yixu Wang (equal contribution), En-Jui Kuo, and Victor V. Albert, Qubit-oscillator concatenated codes: decoding formalism & code comparison PRX Quantum 4, 020342
  10. Sun-Ting Tsai, Eric Fields, Yijia Xu, En-Jui Kuo, and Pratyush Tiwary, Path sampling of recurrent neural networks by incorporating known physics Nature Commun 13, 7231 (2022)
  11. En-Jui Kuo, Yijia Xu (equal contribution), Dminik Hangleiter, Andrey Grankin, and Mohammad Hafezi, Boson Sampling for Generalized Bosons Phys. Rev. Research 4, 043096
  12. Yu-An Chen and Yijia Xu (alphabetical order), Equivalence between fermion-to-qubit mappings in two spatial dimensions PRX Quantum 4, 010326
  13. Yu-An Chen, Andrew M. Childs, Mohammad Hafezi, Zhang Jiang, Hwanmun Kim, and Yijia Xu (alphabetical order), Efficient product formulas for commutators and applications to quantum simulation Phys. Rev. Research 4, 013191

Awards