Colored and Dissipative Continuous Spontaneous Localization model and Bounds from Matter-Wave Interferometry

TL;DR

This paper analyzes bounds on collapse models from matter-wave interferometry, introduces a colored and dissipative CSL model, and discusses its implications for macroscopicity, showing bounds are weakly dependent on collapse details.

Contribution

It introduces a colored and dissipative CSL model, derives bounds from matter-wave interferometry, and explores macroscopicity measures within this framework.

Findings

Bounds on CSL models from interferometry are weakly dependent on collapse details.

The cdCSL model generalizes CSL with colored and dissipative features.

The paper provides a new measure of macroscopicity based on the cdCSL model.

Abstract

Matter-wave interferometry is a direct test of the quantum superposition principle for massive systems, and of collapse models. Here we show that the bounds placed by matter-wave interferometry depend weakly on the details of the collapse mechanism. Specifically, we compute the bounds on the CSL model and its variants, provided by the the KDTL interferometry experiment of Arndt's group [Phys. Chem. Chem. Phys., 2013, 15, 14696-14700], which currently holds the record of largest mass in interferometry. We also show that the CSL family of models emerges naturally by considering a minimal set of assumptions. In particular, we construct the dynamical map for the colored and dissipative Continuous Spontaneous Localization (cdCSL) model, which reduces to the CSL model and variants in the appropriate limits. In addition, we discuss the measure of macroscopicity based on the cdCSL model.