Welcome to my personal homepage! I am a postdoctoral researcher at Perimeter Institute for Theoretical Physics, supervised by Sisi Zhou. I obtained my PhD in Computer Science at The University of Hong Kong, supervised by Yuxiang Yang and Giulio Chiribella. I obtained my M.Sc. in Physics at ETH Zurich and my B.Sc. in Physics at Peking University.

I work on quantum information theory. My research interests include quantum metrology, quantum control and quantum foundations.

Selected Publications

• Heisenberg-Limited Quantum Metrology without Ancillae
  Qiushi Liu and Yuxiang Yang
  Physical Review Letters 135, 140801 (2025)
  arXiv:2403.04585
• Efficient tensor networks for control-enhanced quantum metrology
  Qiushi Liu and Yuxiang Yang
  Quantum 8, 1571 (2024)
  arXiv:2403.09519
• Fully-Optimized Quantum Metrology: Framework, Tools, and Applications
  Qiushi Liu, Zihao Hu, Haidong Yuan, and Yuxiang Yang
  Advanced Quantum Technologies 7, 2400094 (2024)
  arXiv:2409.07068
• Optimal Strategies of Quantum Metrology with a Strict Hierarchy
  Qiushi Liu, Zihao Hu, Haidong Yuan, and Yuxiang Yang
  Physical Review Letters 130, 070803 (2023) & TQC 2023
  arXiv:2203.09758