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Remarks on Causality in Relativistic Quantum Field Theory
classification
🪐 quant-ph
keywords
fieldquantumtheorycausalityrelativisticalgebrasassociatedbackward
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It is shown that the correlations predicted by relativistic quantum field theory in locally normal states between projections in local von Neumann algebras $\cA(V_1),\cA(V_2)$ associated with spacelike separated spacetime regions $V_1,V_2$ have a (Reichenbachian) common cause located in the union of the backward light cones of $V_1$ and $V_2$. Further comments on causality and independence in quantum field theory are made.
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