Entanglement and the Path Integral

Publication Date

2-1-2023

Document Type

Article

Publication Title

Foundations of Physics

Volume

53

Issue

1

DOI

10.1007/s10701-022-00664-9

Abstract

The path integral is not typically utilized for analyzing entanglement experiments, in part because there is no standard toolbox for converting an arbitrary experiment into a form allowing a simple sum-over-history calculation. After completing the last portion of this toolbox (a technique for implementing multi-particle measurements in an entangled basis), some interesting 4- and 6-particle experiments are analyzed with this alternate technique. While the joint probabilities of measurement outcomes are always equivalent to conventional quantum mechanics, differences in the calculations motivate a number of foundational insights, concerning nonlocality, retrocausality, and the objectivity of entanglement itself.

Keywords

Entanglement swapping, Future input dependence, Quantum entanglement, Sum over histories, Triangle network

Department

Physics and Astronomy

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