Light with complex rotational properties can reveal how quantum effects workJose A. Bernat Bacete/Getty ImagesQuantum light has shown that the spookiness that can inextricably link two distant particles can be equivalent to an equally odd property of just one. This may be useful for developing quantum technologies and help researchers understand why quantum particles can become entangled to begin with.The quantum world operates in ways that are fundamentally different from the familiar, deterministic laws of classical physics, says Jianqi Sheng