Quantum randomness and nonlocality: New insights from MIMO systems

Quantum randomness and nonlocality: New insights from MIMO systems

Researchers from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences revealed that not all forms of quantum nonlocality guarantee intrinsic randomness. They demonstrated that violating two-input Bell inequalities is both necessary and sufficient for certifying randomness, but this equivalence breaks down in scenarios involving multiple inputs. The study is published in Physical Review Letters.