Presentation + Paper
13 March 2024 Effect of spatial dimensionality on the spin-coherence decay in strongly-coupled spin baths
Philip Schätzle, Walter Hahn
Author Affiliations +
Abstract
For quantum-technology applications, spin defects in solids are promising candidates but they are limited by their spin-coherence time. Hence, understanding the processes governing the spin-coherence decay is essential. We numerically calculate the spin-coherence time T2 of the NV−-centre electron spin in diamond layers of different thickness in presence of a strongly-coupled disordered electron-spin bath. We show that the spin-coherence time in two-dimensional spin baths is longer than in three-dimensional spin baths. Furthermore, we obtain the corresponding stretched-exponential parameter, which also depends on the spatial dimensionality. We use the partitioning-based cluster-correlation expansion (pCCE) method, which partitions the bath into local subsystems and applies the clustion-correlation expansion method to these subsystems instead of individual spins, thereby offering a better numerical accuracy, especially in two-dimensional geometries.
Conference Presentation
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Philip Schätzle and Walter Hahn "Effect of spatial dimensionality on the spin-coherence decay in strongly-coupled spin baths", Proc. SPIE 12911, Quantum Computing, Communication, and Simulation IV, 129110V (13 March 2024); https://doi.org/10.1117/12.3002207
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KEYWORDS
Diamond

Quantum spin

Thin films

Quantum computing

Nitrogen

Quantum noise

Quantum processes

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