Single-particle entanglement and three forms of ambiguity
History and Philosophy of Physics
2019-12-25 v1 Quantum Physics
Abstract
This paper discusses experiments with single-particle systems, some of whose states appear to be entangled. It shows that the interpretation of the experiments in terms of entanglement is ill-defined. Three forms of ambiguity are discussed. The choice of state-space and its dimensions is a matter of taste. There is not an a-priori natural partitioning of the state-space. The observables are not necessarily experimentally accessible and only determined by theory-laden extrapolation from experimental results. These ambiguities need to be addressed in the formulation of any general theory of entanglement.
Cite
@article{arxiv.1912.11349,
title = {Single-particle entanglement and three forms of ambiguity},
author = {Robert Shaw},
journal= {arXiv preprint arXiv:1912.11349},
year = {2019}
}