Understanding central spin decoherence due to interacting dissipative spin baths

• URL: http://arxiv.org/abs/2312.01205v1
• Date: Sat, 2 Dec 2023 19:04:26 GMT
• Title: Understanding central spin decoherence due to interacting dissipative spin baths
• Authors: Mykyta Onizhuk, Yu-Xin Wang, Jonah Nagura, Aashish A. Clerk, and Giulia Galli
• Abstract summary: We propose a new approach to simulate the decoherence of a central spin coupled to an interacting dissipative spin bath. 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.
• Score: 17.695669245980124
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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