In current quantum field theory, causality is typically defined by the vanishing of field commutators for spacelike separations. Two researchers at the University of Massachusetts and Universidade Federal Rural in Rio de Janeiro have recently carried out a study discussing and synthesizing some of the key aspects of causality in quantum field theory. Their paper, published in Physical Review Letters, is the result of their investigation of a theory of quantum gravity commonly referred to as "qua... PHYS.ORG · 2 weeks
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Tuning quantum materials with hydrogen gas  PHYS.ORG · 19 hours
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New research finding gives valleytronics a boost  nanowerk · 3 weeks
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Deep neural networks speed up weather and climate models  PHYS.ORG · 6 days
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New research finding gives valleytronics a boost  PHYS.ORG · 3 weeks
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Epitaxially-grown molybdenum oxide advances as a bulk-like 2-D dielectric layer  PHYS.ORG · 6 days
Since the successful isolation of graphene from bulk graphite, remarkable properties of graphene have attracted many scientists to the brand-new research field of 2-D materials. However, despite excellent... more
What Google's 'quantum supremacy' means for the future of computing  PHYS.ORG · 4 weeks
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