Effect of spatial dimensionality on the spin-coherence decay in strongly-coupled spin baths

Philip Schätzle; Walter Hahn

doi:10.1117/12.3002207

13 March 2024 Effect of spatial dimensionality on the spin-coherence decay in strongly-coupled spin baths

Philip Schätzle, Walter Hahn

Proceedings Volume 12911, Quantum Computing, Communication, and Simulation IV; 129110V (2024) https://doi.org/10.1117/12.3002207
Event: SPIE Quantum West, 2024, San Francisco, California, United States

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.

Citation Download Citation

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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