Abstractions

摘要

Quantum mechanics often conflicts with everyday assumptions. Entanglement, for example, defies the idea that two objects cannot physically interact with one another at a distance. Physicists have tried to resolve this by abandoning the idea of 'locality' in their theories. But as Markus Aspelmeyer from the University of Vienna in Austria and his colleagues reveal on page 871, this is not enough and certain aspects of realism — which holds that reality exists independently of observers — must also be cast aside.