Foundations of Physics 41 (7):1236-1262 (2011)

A model for measurement in collapse-free nonrelativistic fermionic quantum field theory is presented. In addition to local propagation and effectively-local interactions, the model incorporates explicit representations of localized observers, thus extending an earlier model of entanglement generation in Everett quantum field theory (Rubin in Found. Phys. 32:1495–1523, 2002). Transformations of the field operators from the Heisenberg picture to the Deutsch-Hayden picture, involving fictitious auxiliary fields, establish the locality of the model. The model is applied to manifestly-local calculations of the results of measurements, using a type of sudden approximation and in the limit of massive systems in narrow-wavepacket states. Detection of the presence of a spin-1/2 system in a given spin state by a freely-moving two-state observer illustrates the features of the model and the nonperturbative computational methodology. With the help of perturbation theory the model is applied to a calculation of the quintessential “nonlocal” quantum phenomenon, spin correlations in the Einstein-Podolsky-Rosen-Bohm experiment
Keywords Everett interpretation  Quantum field theory  Locality  Deutsch-Hayden picture  Einstein-Podolsky-Rosen-Bohm experiment
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DOI 10.1007/s10701-011-9543-6
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The Direction of Time.Hans Reichenbach - 1956 - Dover Publications.
The Direction of Time.HANS REICHENBACH - 1956 - Philosophy 34 (128):65-66.

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Many-Worlds Interpretation of Quantum Mechanics.Lev Vaidman - 2008 - Stanford Encyclopedia of Philosophy.

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