Criticality-amplified quantum probing of a spontaneous collapse model

• URL: http://arxiv.org/abs/2407.09304v1
• Date: Fri, 12 Jul 2024 14:37:58 GMT
• Title: Criticality-amplified quantum probing of a spontaneous collapse model
• Authors: Giorgio Zicari, Matteo Carlesso, Andrea Trombettoni, Mauro Paternostro,
• Abstract summary: Spontaneous collapse models are designed to account for dynamical wavepacket reduction. We introduce a it quantum-probing approach to deriving metrological upper bounds on the free parameters of such empirical models.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Spontaneous collapse models, which are phenomenological mechanisms introduced and designed to account for dynamical wavepacket reduction, are attracting a growing interest from the community interested in the characterisation of the quantum-to-classical transition. Here, we introduce a {\it quantum-probing} approach to the quest of deriving metrological upper bounds on the free parameters of such empirical models. To illustrate our approach, we consider an extended quantum Ising chain whose elements are -- either individually or collectively -- affected by a mechanism responsible for spontaneous collapse. We explore configurations involving out-of-equilibrium states of the chain, which allows us to infer information about the collapse mechanism before it is completely scrambled from the state of the system. Moreover, we investigate potential amplification effects on the probing performance based on the exploitation of quantum criticality.

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