# Optimal measurements for quantum fidelity between Gaussian states and its relevance to quantum metrology

Author(s): Changhun Oh, Changhyoup Lee, Leonardo Banchi, Su-Yong Lee, Carsten Rockstuhl, and Hyunseok Jeong
Quantum fidelity is a measure to quantify the closeness between two quantum states. In an operational sense, it is defined as the minimal overlap between the probability distributions of measurement outcomes and the minimum is taken over all possible positive-operator valued measures (POVMs). Quantu...
[Phys. Rev. A 100, 012323] Published Tue Jul 16, 2019