Abstract

Sherlock Holmes is reputed to have once remarked impatiently to his earnest but plodding colleague Watson, “How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?” In Quantum Non-Locality and Relativity, Tim Maudlin offers us a thorough and provocative argument based on this methodological principle. Maudlin insists that all explanations of the mysterious non-local correlations of quantum mechanics must by now be rejected except one: distant events in quantum systems really are “causally implicated” in a way that directly challenges the theory of relativity. Physicists and philosophers of science have made virtually every conceivable move to avoid this unsettling conclusion, including tinkering with the basic formalism or interpretation of the theory, and Arthur Fine’s oddly postmodernist recommendation that we should abandon as outmoded “essentialism” all hope of explaining the correlations. However, the threat to relativity just won’t go away. Maudlin argues that we should have paid better attention in the first place to J. S. Bell, who “concluded that violations of [his] inequality demonstrate that the world is not locally causal.... Instead of trying to deny these non-local influences, we should begin to study the role such influences must play in generating the phenomena”.