Characterising quantum measurement through environmental stochastic entropy production in a two spin 1/2 system

• URL: http://arxiv.org/abs/2504.10172v1
• Date: Mon, 14 Apr 2025 12:25:20 GMT
• Title: Characterising quantum measurement through environmental stochastic entropy production in a two spin 1/2 system
• Authors: Sophia M. Walls, Adam Bloss, Ian J. Ford,
• Abstract summary: Quantum state diffusion is a framework within which measurement may be described as the continuous and gradual collapse of a quantum system to an eigenstate as a result of interaction with its environment.<n>We consider a system of two spin 1/2 particles undergoing either single particle measurements or measurements of the total z-spin component S_z.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum state diffusion is a framework within which measurement may be described as the continuous and gradual collapse of a quantum system to an eigenstate as a result of interaction with its environment. The irreversible nature of the quantum trajectories that arise may be characterised by the environmental stochastic entropy production associated with the measurement. We consider a system of two spin 1/2 particles undergoing either single particle measurements or measurements of the total z-spin component S_{z}. The mean asymptotic rates of environmental stochastic entropy production associated with collapse can depend on the eigenstate of S_{z} selected, and on the initial state of the system, offering an additional avenue for characterising quantum measurement.

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