About Me

I am a third year Ph.D student studying Computer Science at University of Texas at Austin, advised by Prof. Dana Moshkovitz. My research is mainly focused on complexity theory, especially in hardness of approximation and circuit lower bounds.

I am also interested in topics such as quantum complexity, coding theory and spectral graph theory.

Publications / Manuscripts

• Quantum Meets Minimum Circuit Size Problem
  Nai-Hui Chia, Chi-Ning Chou, Jiayu Zhang, Ruizhe Zhang

• Hybrid Quantum-Classical Implementation of Training Over-Parameterized Neural Networks
  Zhao Song, Ruizhe Zhang

• Symmetric Boolean Factor Analysis with Applications to InstaHide
  Sitan Chen, Zhao Song, Runzhou Tao, Ruizhe Zhang
  [arxiv]
  

• InstaHide's Sample Complexity When Mixing Two Private Images
  Baihe Huang, Zhao Song, Runzhou Tao, Ruizhe Zhang, Danyang Zhuo
  [arxiv]
  

• Hyperbolic polynomials I: Concentration and Discrepancy
  Zhao Song, Ruizhe Zhang
  [arxiv]
  

• New Approaches for Quantum Copy-Protection
  Scott Aaronson, Jiahui Liu, Qipeng Liu, Mark Zhandry, Ruizhe Zhang
  To appear in the 41st Annual International Cryptology Conference (Crypto'2021)
  Contributed talk at the 16th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC'2021)
  [arxiv]
  

• QED driven QAOA for network-flow optimization
  Yuxuan Zhang, Ruizhe Zhang, Andrew C. Potter
  [arxiv]
  

• On the Quantum Complexity of Closest Pair and Related Problems
  Scott Aaronson, Nai-Hui Chia, Han-Hsuan Lin, Chunhao Wang, Ruizhe Zhang
  In Proceedings of the 35th Computational Complexity Conference (CCC'2020)
  Contributed talk at the 15th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC'2020)
  [arxiv]