Temperature dependence of quasi-localized phonons-mediated non-Markovianity dynamics of SiV^- centers in diamond
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912446552211456 |
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| author | Ye, Wanggui Zhang, Debao Cao, Xuguang Zhou, Ji Fan, Xinye Liu, Sicheng Yu, Ke Ning, Jiqiang Xu, Shijie |
| author_facet | Ye, Wanggui Zhang, Debao Cao, Xuguang Zhou, Ji Fan, Xinye Liu, Sicheng Yu, Ke Ning, Jiqiang Xu, Shijie |
| contents | 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 N_C shows memory effects persisting at low temperatures but diminishing at high temperatures due to enhanced damping. The temperature dependence of N_C follows a monotonic decay, from which a transition temperature T_NM=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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_19317 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Temperature dependence of quasi-localized phonons-mediated non-Markovianity dynamics of SiV^- centers in diamond Ye, Wanggui Zhang, Debao Cao, Xuguang Zhou, Ji Fan, Xinye Liu, Sicheng Yu, Ke Ning, Jiqiang Xu, Shijie Optics 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 N_C shows memory effects persisting at low temperatures but diminishing at high temperatures due to enhanced damping. The temperature dependence of N_C follows a monotonic decay, from which a transition temperature T_NM=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. |
| title | Temperature dependence of quasi-localized phonons-mediated non-Markovianity dynamics of SiV^- centers in diamond |
| topic | Optics |
| url | https://arxiv.org/abs/2506.19317 |