Entanglement and the Measurement Problem

The entangled “measurement state” (MS), predicted by von Neumann to arise during quantum measurement, seems display paradoxical properties such as multiple macroscopic outcomes. But analysis of interferometry experiments using photon pairs shows that states differ surprisingly from simple superposition states. Based on standard theory, this paper the MS (i) does not represent detector readings but instead represents nonparadoxical statistical correlations between system and readings, (ii) implies exactly one outcome actually occurs, (iii) when other possible outcomes simultaneously collapse nonlocally. Point resolves an issue first raised in 1927 Einstein who demonstrated theory requires instantaneous state collapse. This conundrum’s resolution nonlocal correlations, which today’s perspective suggests should be state. Thus, contrary previous presumed proofs measurement problem’s insolubility, we find collapsed just what expect upon measurement.