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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2511.05388 |
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| _version_ | 1866917355158765568 |
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| author | Zheng, Jie Kang, Jiyong Zhu, Zheng Wu, Di Li, Yuesheng Yu, Dongxing Wang, Jiayong Xu, Hongxing Jia, Chenglong |
| author_facet | Zheng, Jie Kang, Jiyong Zhu, Zheng Wu, Di Li, Yuesheng Yu, Dongxing Wang, Jiayong Xu, Hongxing Jia, Chenglong |
| contents | We investigate spin quantum-fluctuation effects that originate from the Heisenberg uncertainty principle during the dynamical cycle of disentanglement, entanglement, and re-disentanglement between itinerant electrons and localized magnetic moments mediated by the s-d exchange interaction. Beyond conventional deterministic spin-transfer torque, we analyze an intrinsic mechanism that transfers spin quantum fluctuations to a nanomagnet. By extending the Landau-Lifshitz-Gilbert equation to incorporate both quantum and thermal stochastic fields, we identify a temperature regime in which quantum fluctuations dominate the magnetization dynamics. We further show that voltage-controlled magnetic anisotropy exponentially amplifies spin quantum fluctuations, enabling binary readout through magnetoresistance in magnetic tunnel junctions. These findings provide a microscopic framework for fluctuation-driven spin dynamics and outline a device-level pathway toward spin-based quantum true random number generation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_05388 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Spin-Based True Random Number Generation Enabled by Voltage-Amplified Quantum Fluctuations Zheng, Jie Kang, Jiyong Zhu, Zheng Wu, Di Li, Yuesheng Yu, Dongxing Wang, Jiayong Xu, Hongxing Jia, Chenglong Mesoscale and Nanoscale Physics We investigate spin quantum-fluctuation effects that originate from the Heisenberg uncertainty principle during the dynamical cycle of disentanglement, entanglement, and re-disentanglement between itinerant electrons and localized magnetic moments mediated by the s-d exchange interaction. Beyond conventional deterministic spin-transfer torque, we analyze an intrinsic mechanism that transfers spin quantum fluctuations to a nanomagnet. By extending the Landau-Lifshitz-Gilbert equation to incorporate both quantum and thermal stochastic fields, we identify a temperature regime in which quantum fluctuations dominate the magnetization dynamics. We further show that voltage-controlled magnetic anisotropy exponentially amplifies spin quantum fluctuations, enabling binary readout through magnetoresistance in magnetic tunnel junctions. These findings provide a microscopic framework for fluctuation-driven spin dynamics and outline a device-level pathway toward spin-based quantum true random number generation. |
| title | Spin-Based True Random Number Generation Enabled by Voltage-Amplified Quantum Fluctuations |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2511.05388 |