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Bell-EPR Correlations within Local Quantum Theory

Jay Lawrence

Abstract

We present a local unitary theory of a Bell-EPR measurement, starting with the premeasurement filtering of the individual photon polarizations and extending through the detection process involving four photodetectors, two at each receiving station. The essential feature is that decoherence occurs locally and independently with each detector upon its absorption of a photon. Communication between observers after they read their local outcomes confirms the known Bell-EPR correlations. This theory is manifestly local, but there exist other formulations, and interpretations, that are non-local.

Bell-EPR Correlations within Local Quantum Theory

Abstract

We present a local unitary theory of a Bell-EPR measurement, starting with the premeasurement filtering of the individual photon polarizations and extending through the detection process involving four photodetectors, two at each receiving station. The essential feature is that decoherence occurs locally and independently with each detector upon its absorption of a photon. Communication between observers after they read their local outcomes confirms the known Bell-EPR correlations. This theory is manifestly local, but there exist other formulations, and interpretations, that are non-local.
Paper Structure (12 sections, 16 equations, 1 figure)

This paper contains 12 sections, 16 equations, 1 figure.

Table of Contents

  1. Introduction
  2. Local Quantum Theory
  3. Dependence on interpretations
  4. Other Opinions
  5. The Evolution of States
  6. The Density Matrix and Outcomes
  7. Imperfect Correlations
  8. Discussion
  9. Behind the Partial Trace
  10. Observers and Locality
  11. Against Interpretation
  12. Conclusions

Figures (1)

  • Figure 1: Far-separated detector systems for measuring the polarization of each photon. At each station there are detectors for both vertical and horizontal polarizations.