Yuchen Guo (he/him/his)

“To establish a unifying framework that connects theoretical tensor-network tools with experimental quantum computing platforms, enabling robust characterization and control of open-system quantum phases.”

I’m a fourth-year Ph.D. student in the Department of Physics, Tsinghua University, working on tensor-network approaches to quantum computation, open quantum systems, and topological phases. My long-term goal is to develop theoretical and experimental strategies to characterize and control quantum phases in realistic noisy quantum systems. I am very fortunate to be advised by Prof. Shuo Yang (homepage).

I am based in Beijing, and am in Hong Kong from September 2026 to January 2027 as a Junior Research Assistant at the Chinese University of Hong Kong.

Research Focus

• Developing new quantum computation techniques
• Discovering novel topological quantum matter
• Exploring the interplay between noise/dissipation and entanglement
• Rigorous analysis of quantum algorithms, including cryptographic applications

News / Updates

• Sep 2026 — Our theory–experiment collaboration on non-Hermitian parent Hamiltonians is published in Phys. Rev. Lett. 137, 110401 — the first experimental realization of NH parent Hamiltonians, with Prof. Peng Xue’s group.
• Sep 2026 – Jan 2027 — Visiting the Chinese University of Hong Kong as a Junior Research Assistant.
• 2025 — National Scholarship for Ph.D. Students; NSFC Young Student Basic Research Project.
• New preprints — Quantum criticality in open systems from the purification perspective (arXiv:2602.21979); tensor-network readout error mitigation (arXiv:2606.25974); rigorous lemmas for Simon’s dihedral-coset algorithm (arXiv:2608.16598).

Selected Publications

• A New Framework for Quantum Phases in Open Systems: Steady State of Imaginary-Time Lindbladian Evolution
  Yuchen Guo, Ke Ding, and Shuo Yang, Rep. Prog. Phys. 88, 118001 (2025).
  Imaginary-time Lindbladian formalism for classification of open-system quantum phases
• Locally Purified Density Operators for Symmetry-Protected Topological Phases in Mixed States
  Yuchen Guo^#, Jian-Hao Zhang^#, Hao-Ran Zhang, Shuo Yang, and Zhen Bi, Phys. Rev. X 15, 021060 (2025).
  Tensor network formulation for classification and construction of topological phases in open systems
• Quantum Error Mitigation via Matrix Product Operators
  Yuchen Guo and Shuo Yang, PRX Quantum 3, 040313 (2022).
  A new error mitigation approach based on the tensor network representation of the noise channels.
• Construction of Non-Hermitian Parent Hamiltonian from Matrix Product States
  Ruohan Shen^#, Yuchen Guo^#, and Shuo Yang, Phys. Rev. Lett. 130, 220401 (2023).
  A new parent Hamiltonian method for systematically constructing non-Hermitian systems.
• Parent Hamiltonian and Intrinsic Phase Transition in Non-Hermitian Photonic Systems
  Yuntao Xiao^#, Yuchen Guo^#, Xiaojian Huang, Huixia Gao, Dengke Qu, Lei Xiao, Kunkun Wang, Shuo Yang, and Peng Xue, Phys. Rev. Lett. 137, 110401 (2026).
  First experimental realization of non-Hermitian parent Hamiltonians, and observation of an intrinsic non-Hermitian phase transition with single photons
• Noise effects on purity and quantum entanglement in terms of physical implementability
  Yuchen Guo and Shuo Yang, npj Quantum Inform. 9, 11 (2023).
  Two universal and concise inequations describing the destructive effects of quantum noise on purity and quantum entanglement.
• Strong-to-weak spontaneous symmetry breaking meets average symmetry-protected topological order
  Yuchen Guo and Shuo Yang, Phys. Rev. B 111, L201108 (2025, Editors Suggestion).
  A new quantum phase in open systems with the coexistence of symmetry-protected topological order and spontaneous symmetry-breaking order

👉 Full list: see Publications.

CV · Service · Contact

• 📄 Full CV (PDF) — last updated Sep 2026
• 📝 Academic Service: Referee for PRX, PRL, PRX Quantum, PRR, PRA, PRB
• 🌍 Profiles:
  Email · Google Scholar (automatically updated) · ORCID · ResearchGate · Github