Machine Learning-Based Characterisation of the Non-Markovian Dynamics of a Nitrogen-Vacancy Centre

• URL: http://arxiv.org/abs/2608.27632v1
• Date: Thu, 27 Aug 2026 19:16:45 GMT
• Title: Machine Learning-Based Characterisation of the Non-Markovian Dynamics of a Nitrogen-Vacancy Centre
• Abstract summary: We present the first experimental demonstration of a machine learning-based reconstruction of spectral density parameters from NV centre Rabi dynamics.<n>Our results demonstrate that the model predicted by the neural network can reliably reproduce the NV dynamics over the estimation window.
• Score: 2.5202400042690045
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The interaction between a quantum system and its environment can be characterized by the spectral density function: knowing its structure is important for optimizing applications of quantum technologies such as quantum sensing protocols. In this work, we present the first experimental demonstration of a machine learning-based reconstruction of reaction-coordinate spectral density parameters from NV centre Rabi dynamics. Unlike the previous work, we recover all spectral density parameters rather than only the central frequency, and benchmark the performance of the neural network against the Cramér-Rao bound and maximum likelihood estimator. Our results demonstrate that the model predicted by the neural network can reliably reproduce the NV dynamics over the estimation window, and can produce estimates for some parameters with variances comparable to that of maximum likelihood.

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