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Posts
Two Results on Common-Mask Unclonability
Published:
This note records a Goldreich-Levin search-to-decision result for arbitrarily entangled split states and an exponential upper bound for the uniform-mask I/X/Z parity game.
publications
Group twirling and noise tailoring for multiqubit controlled phase gates
Guoding Liu, Ziyi Xie, Zitai Xu, Xiongfeng Ma
Physical Review Research 6, 043221, 2024
The Curious Case of "XOR Repetition" of Monogamy-of-Entanglement Games
Andrea Coladangelo, Qipeng Liu, Ziyi Xie
ITCS, 2026
Unclonable encryption from BB84 states: a simultaneous Goldreich-Levin reduction
Andrea Coladangelo, Qipeng Liu, Ziyi Xie
arXiv:2608.17629 (preprint), 2026
Quantum Query Advantage Requires Space
Minbo Gao, Zhengfeng Ji, Ziyi Xie
ECCC TR26-171 (technical report), 2026
talks
teaching
Foundations of Cryptography
Teaching Assistant · Spring 2025
Instructor: Yilei Chen · Tsinghua University, IIIS
Introduction to Theoretical Computer Science
Teaching Assistant · Spring 2026
Instructor: Zhengfeng Ji · Tsinghua University, DCST
Discrete Mathematics
Teaching Assistant · Fall 2026
Instructor: Jianxin Chen · Tsinghua University, DCST