Contrasting GHZ and W-state Entanglement Dynamics due to Correlated Markov Noise

• URL: http://arxiv.org/abs/2511.05827v2
• Date: Fri, 14 Nov 2025 01:08:56 GMT
• Title: Contrasting GHZ and W-state Entanglement Dynamics due to Correlated Markov Noise
• Authors: Stephen Brockerhoff, Brittany Corn-Agostini,
• Abstract summary: We show that correlations between noise sources can influence the dynamics of multipartite entanglement.<n>We identify regimes in which multipartite entanglement can be sustained despite environmental interactions.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The ability to preserve multipartite entanglement in noisy environments is central to advancing quantum information processing. In this work, we develop a semiclassical theoretical model of three entangled qubits exposed to local Markov noise environments with tunable statistical correlations between noise sources. We show that such correlations can significantly influence the dynamics of multipartite entanglement, in some cases slowing its decay and, under ideal conditions, even enabling full preservation. Using tripartite negativity as an entanglement measure, we derive analytical results for the GHZ and W states, demonstrating their contrasting responses to correlated and anticorrelated noise. Our analysis identifies regimes in which multipartite entanglement can be sustained despite environmental interactions, offering new insight into how noise correlations may serve as a resource for protecting quantum coherence in multi-qubit systems.

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