2025/06/24 by Wanggui Ye, Ye, Wanggui, Debao Zhang +15
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Force Microscopy Techniques and Applications #High-pressure geophysics and materials #Optics (physics.optics)
paper · pdf · doi:10.48550/arxiv.2506.19317
openalex publication_date 2025/06/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Here we investigate the temperature-dependent non-Markovian dynamics of the SiV- center in diamond, focusing on the roles of low- and high-frequency quasi-localized phonon modes. Low-frequency phonons exhibit stronger electron-phonon coupling, leading to long-lived dephasing rate, while high-frequency phonons induce rapid attenuation of oscillatory dephasing rate facilitating a persistent memory effect. The non-Markovianity measure NC shows memory effects persisting at low temperatures but diminishing at high temperatures due to enhanced damping. The temperature dependence of NC follows a monotonic decay, from which a transition temperature TNM=110 K is determined. These results highlight the interplay between phonon activation and damping in shaping quantum coherence, offering insights for optimizing solid-state quantum systems.