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 completed my PhD at the Joint Center for Quantum Information and Computer Science, where I was fortunate to be advised by Victor V. Albert.

My research interest is quantum information, quantum error correction, and quantum fault tolerance. I am interested in homological algebra and its application to quantum codes as well as fault tolerance. Aside from the conventional stabilizer codes, I am also interested in other formalisms of error correction such as covariant encoding and the theory of approximate error correction.

Research interests:

Papers

  1. Yijia Xu, Yixu Wang, Zi-Wen Liu, Theory of spacetime quantum fault tolerance arxiv: 2609.39758
  2. Zhengyi Han, Yuanchen Zhao, Yijia Xu, Yixu Wang, Zi-Wen Liu, Coherent error threshold for quantum LDPC codes arxiv: 2609.20537
  3. Yixu Wang, Yijia Xu, Zi-Wen Liu, Approximate quantum error correction theory of non-isometric codes arxiv: 2606.13559
  4. 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
  5. Yijia Xu, Yixu Wang, Zi-Wen Liu, A framework for low-overhead quantum fault tolerance via spacetime lifting arxiv: 2606.06365
  6. 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
  7. 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
  8. 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
  9. 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
  10. Yu-An Chen, Alexey V. Gorshkov, and Yijia Xu (alphabetical order), Error-correcting codes for fermionic quantum simulation SciPost Phys. 16, 033 (2024)
  11. 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
  12. 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)
  13. En-Jui Kuo, Yijia Xu (equal contribution), Dminik Hangleiter, Andrey Grankin, and Mohammad Hafezi, Boson Sampling for Generalized Bosons Phys. Rev. Research 4, 043096
  14. Yu-An Chen and Yijia Xu (alphabetical order), Equivalence between fermion-to-qubit mappings in two spatial dimensions PRX Quantum 4, 010326
  15. 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