The subtleties of entanglement and its role in quantum information theory
Rob Clifton
Abstract For years, since the EPR ‘paradox’ (1935) and Schrodinger’s (1935, 1936) work on entanglement in the 1930s, philosophers of science have struggled to understand quantum correlations. By the end of the 1960s, Bell’s theorem (1964) became widely recognized as establishing that these correlations cannot be explained through the operation of local common causes. Yet it was also clear that, by themselves, quantum correlations cannot be exploited to transmit information between the locations of entangled systems. Many metaphors were developed by philosophers in the 1970s and 1980s to characterize these apparently nonlocal yet curiously benign correlations. They were variously taken to involve ‘passionata distance’, ‘nonrobustness’, ‘relational holism’, and ‘randomness in harmony’ (see, respectively, the contributions of Shimony, Redhead, Teller and Fine to Cushing and McMullin (1989)).
•Sep 23, 2009•0 citations