Minimum measurement time: lower bound on the frequency cutoff for collapse models. (11th May 2020)

• Record Type: Journal Article
• Authors: Adler, Stephen L; Bassi, Angelo; Ferialdi, Luca
• Is Part Of: Journal of physics. Volume 53:Number 21(2020)
• Publication Date: 2020-05-11
• Subjects: collapse models -- colored noise -- lower bound -- frequency cutoff -- non-Markovian; Mathematical physics -- Periodicals; Statistical physics -- Periodicals; Quantum theory -- Periodicals; Matter -- Properties -- Periodicals; 530.105
• DOI: 10.1088/1751-8121/ab8673
• Languages: English
• ISSNs: 1751-8113

Abstract

Abstract: The CSL model predicts a progressive breakdown of the quantum superposition principle, with a noise randomly driving the state of the system towards a localized one, thus accounting for the emergence of a classical world within a quantum framework. In the original model the noise is supposed to be white, but since white noises do not exist in nature, it becomes relevant to identify some of its spectral properties. Experimental data set an upper bound on its frequencies, while in this paper we bound it from below. We do so in two ways: by considering a 'minimal' measurement setup, requiring that the collapse is completed within the measurement time; and in a measurement modeling-independent way, by requiring that the fluctuations average to zero before the measurement time.