Understanding central spin decoherence due to interacting dissipative spin baths

2023/12/02 by Mykyta Onizhuk, Yuxin Wang, Onizhuk, Mykyta +7 · 4 citations
Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Physics of Superconductivity and Magnetism #Quantum Physics (quant-ph) #Theoretical and Computational Physics

paper · pdf · doi:10.48550/arxiv.2312.01205

openalex publication_date 2023/12/02 · openalex created_date 2023/12/06 · openalex updated_date 2026/07/28

Abstract

We propose a new approach to simulate the decoherence of a central spin coupled to an interacting dissipative spin bath with cluster-correlation expansion techniques. We benchmark the approach on generic 1D and 2D spin baths and find excellent agreement with numerically exact simulations. Our calculations show a complex interplay between dissipation and coherent spin exchange, leading to increased central spin coherence in the presence of fast dissipation. Finally, we model near-surface NV centers in diamond and show that accounting for bath dissipation is crucial to understanding their decoherence. Our method can be applied to a variety of systems and provides a powerful tool to investigate spin dynamics in dissipative environments.

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• Understanding Surface-Induced Decoherence of NV Centers in Diamond
• Numerically exact quantum dynamics with tensor networks: Predicting the decoherence of interacting spin systems
• Non-Markovian amplitude damping in a central spin model with random couplings
• Spin decoherence dynamics of Er³⁺ in CeO₂ film

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