Interactions of pre- and postselected quantum particles
Phys. Rev. A 113, 052227 – Published 26 May, 2026
DOI: https://doi.org/10.1103/7lc8-jprf
Abstract
An approach for analysis of effective interaction between pre- and postselected quantum particles is developed. It is argued that the cases of complete pre- and postselection of particles are more profound than the cases of partial pre- and postselection, since the former goes beyond modification of the average of interactions on an ensemble of experiments. Recently discussed paradoxical phenomena such as the pigeonhole paradox and the modification of the interaction from repulsion to attraction are analyzed within the introduced formalism, and a few surprising examples are presented.
