The issue of phases in quantum measurement theory

Dominic William Berry, Howard M. Wiseman, Elanor H. Huntington

An experiment is proposed for performing adaptive phase measurements on a continuous squeezed beam such that the variance is below the standard quantum limit. The theory takes into account many issues ignored in previous work.

修三 小川

Jerome R. Busemeyer, Zheng Wang

This article presents the results of an experiment, called the ABA experiment, designed to test a fundamental prediction of quantum probability theory when applied to human judgments and decisions. The prediction concerns the effect of one measurement on another when the measurements are incompatible (i.e., the answers to the measurements depend on the order of these measurements). After an initial measurement of an opinion on an issue, A, the answer to a second measurement on the same issue A immediately afterwards will certainly be the same as the first. However, according to the uncertainty principle, if a measurement of opinion on issue A is followed by an incompatible measurement on another issue, B, then the answer to a second measurement on issue A will become uncertain. This prediction was tested with 325 participants on a wide range of 12 different set of issues that were previously shown to be incompatible. Contrary to previous claims published in this journal, the empirical findings support the prediction of quantum probability theory applied to human judgments.

J. M. Jauch

琼金 黄

The problem of single-outcome selection in quantum measurement is a long-standing open issue in decoherence theory. In this work, we propose a settlement recorder model, which naturally emerges wavefunction collapse and Born rule within the standard quantum mechanics framework, and presents three experimentally testable predictions.

Howard M. Wiseman, Gerard J Milburn