中国科学院数学与系统科学研究院
数学研究所
数学科学全国重点实验室
计算机科学研讨班
Speaker: 李卫靖 （河北经贸大学）
Inviter: 李阳阳
Language: Chinese
Title：Efficient estimation of the quantum Chernoff bound
Time&Venue：2026年3月11日（星期三）10:00-11:00 （腾讯会议804-328-465）
Abstract: The quantum phase has long been recognized as a fundamental yet elusive concept in quantum optics. In this work, we introduce an information-theoretic quantifier for quantum phase uncertainty based on the generalized Wigner-Yanase skew information, applied to the Susskind-Glogower (SG) phase operator E. We show that this quantifier, denoted I(ρ,E), satisfies natural physical requirements and captures the intuitive behavior of phase uncertainty. Our work offers a unified framework for quantifying phase uncertainty and opens new avenues for exploring phase as a quantum resource.