Welcome to the Quantum News Daily Brief. Story 1: Shanghai Jiao Tong University: Researchers Improve Quantum State Fidelity Estimation with Faster Protocol. Qisheng Wang, from Shanghai Jiao Tong University, and colleagues have achieved a key advancement in estimating the fidelity of an unknown quantum state to a known reference state. The new method achieves a sample complexity of O(r2/varepsilon2) with optimal dependence on the error $\varepsilon$ for a reference state of rank $r$. This improve