This white paper aims to identify an open problem in 'Quantum Physics and the
Nature of Reality' --namely whether quantum theory and special relativity are
formally compatible--, to indicate what the underlying issues are, and put
forward ideas about how the problem might be addressed.Comment: Invited white paper for Quantum Physics and the Nature of Reality,
John Polkinghorne 80th Birthday Conference. St Anne's College, Oxford. 26-29
September 201