A pair of quantum particles can be used to perform telepathy even if they are only slightly linked to each other.
Physicists used to believe that you needed maximal entanglement to achieve the most extreme forms of quantum non-locality. This study proves that every single pure entangled state, no matter how weak, can lead to these full non-local correlations. This means that the strength of the link doesn't limit the potential for quantum pseudo-telepathy tricks. This discovery simplifies the requirements for building certain types of quantum communication networks. It shows that quantum weirdness is a binary switch rather than a gradual scale.
All pure entangled states can lead to fully nonlocal correlations
arXiv · 2604.26605
It is a well-established fact that some quantum correlations can be nonlocal, meaning that they cannot be described by a local hidden variable model. Certain quantum correlations have a form of nonlocality so strong that they cannot be reproduced even by models having an arbitrarily small local hidden variable component. These correlations are called fully nonlocal and lead to Bell inequalities in which the maximum quantum value saturates the non-signaling bound. A well-known example of this eff