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Lettere al nuovo cimento della societa italiana di fisica/Lettere al nuovo cimento

A comparison between deterministic and probabilistic local hidden-variable theories

Augusto Garuccio, V. A. Rapisarda

Published Apr 1, 1981• 8 citations
Publisher
DOI
10.1007/bf02817133

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This paper furthers the long historical examination of and debate on the foundations of quantum mechanics (QM) by presenting two local hidden variable (LHV) rules in the context of the EPRB experiment which violate Bell's inequality, but which are nevertheless local and deterministic under reasonable definitions of the terms, and coincide approximately with the conventional QM prediction. The theories are based on the general idea of probabilistic detection of particles depending on an interaction of hidden variables within the measuring device and particle, and relate mathematically to Fourier analysis. The crucial discrepancy of variations in the hidden variable distribution based on relative polarizer orientations is isolated which invalidates assumptions in Bell-type theorems. The first theory can be analyzed completely symbolically whereas the second was analyzed using numerical methods. The properties of the second in particular are shown to be approximately consistent with the reported results and uncertainties in all three Aspect experiments. Variation in the total photon pairs detected over orientations is shown to be a basic characteristic of these theories. Some comments on the relevance of active vs. passive locality are made. Two sections consider these ideas relative to energy conservation and the measurement problem (collapse of the wavefunction). One section proposes new experiments.
There are two issues concerning hidden variables in quantum mechanics: 1.Whether the outcomes of quantum measurements are hidden variables has long been debated. Experiments violating Bell's inequalities have essentially refuted local hidden variable theories. 2.Quantum entanglement provides nonlocal effects that alter wave functions. However, these changes cannot transmit signals, making the exact time of such nonlocal effects a hidden variable. Theories about hidden variables are difficult to verify experimentally due to their unobservability. This paper connects these two hidden variable theories in quantum mechanics, proposing the spacetime relationship that nonlocal effects from entanglement must satisfy to prevent quantum measurement outcomes from being local hidden variables. It further outlines the spacetime relationship that any causal effects should adhere to. Based on this, the paper demonstrates the universal temporal order between relativistic spacelike events. On this foundation, it integrates the locally deterministic relativistic spacetime structure with the nonlocal phenomena of probabilistic quantum mechanics, thereby establishing the universal ordered spacetime structure.