Understanding central spin decoherence due to interacting dissipative spin baths
Quantum Physics
2023-12-05 v1
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.
Cite
@article{arxiv.2312.01205,
title = {Understanding central spin decoherence due to interacting dissipative spin baths},
author = {Mykyta Onizhuk and Yu-Xin Wang and Jonah Nagura and Aashish A. Clerk and Giulia Galli},
journal= {arXiv preprint arXiv:2312.01205},
year = {2023}
}