Tight Cramër-Rao Type Bounds for Multiparameter Quantum Metrology Through Conic Programming

Watch a conference talk from TQC 2023 (Theory of Quantum Computation, Communication and Cryptography Conference) where Yingkai Ouyang presents groundbreaking research on finding optimal measurement strategies for quantum sensors through conic programming. Learn about a novel framework that unifies precision bounds for both uncorrelated and correlated measurement strategies in multiparameter quantum metrology. Discover an efficient algorithm for calculating upper and lower bounds of ultimate precision for uncorrelated measurements, with practical applications for quantum sensing. Explore how this research addresses the fundamental challenge of estimating incompatible parameters in quantum systems with maximum possible precision, demonstrated through numerical evidence showing gaps between previously known bounds and ultimate precision limits.