Entanglement-sensitive observables in $e^{+}{e}^{-}\to {\tau }^{+}{\tau }^{-}$ at STCF: a detector-level feasibility study

Chentao Bao, Xi Tao, Hai Chen +3

Quantum entanglement in ${\tau }^{+}{\tau }^{-}$ production provides a direct probe of non-classical spin correlations in a relativistic quantum system, with the $\tau$ decay products serving as spin…