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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/2510.23862 |
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| _version_ | 1866912673741930496 |
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| author | Kazemi, Moein Keshavarz, Mehdi Turiansky, Mark E. Lyons, John L. Abrosimov, Nikolay V. Simmons, Stephanie Higginbottom, Daniel B. Thewalt, Mike L. W. |
| author_facet | Kazemi, Moein Keshavarz, Mehdi Turiansky, Mark E. Lyons, John L. Abrosimov, Nikolay V. Simmons, Stephanie Higginbottom, Daniel B. Thewalt, Mike L. W. |
| contents | Efficient single-photon emitters are desirable for quantum technologies including quantum networks and photonic quantum computers. We investigate the T centre, a telecommunications-band emitter in silicon, and find a strong isotope dependence of its excited-state lifetime. In particular, the lifetime of the deuterium T centre is over five times longer than the common protium variant. Through explicit first-principles calculations, we demonstrate that this dramatic difference is due to a reduction in the carbon-hydrogen local vibrational mode energy, which suppresses non-radiative decay. Our results imply that the deuterium T centre approaches unit quantum efficiency, enabling more efficient single-photon sources, quantum memories, and entanglement generation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_23862 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Giant Isotope Effect on the Excited-State Lifetime and Emission Efficiency of the Silicon T Centre Kazemi, Moein Keshavarz, Mehdi Turiansky, Mark E. Lyons, John L. Abrosimov, Nikolay V. Simmons, Stephanie Higginbottom, Daniel B. Thewalt, Mike L. W. Quantum Physics Efficient single-photon emitters are desirable for quantum technologies including quantum networks and photonic quantum computers. We investigate the T centre, a telecommunications-band emitter in silicon, and find a strong isotope dependence of its excited-state lifetime. In particular, the lifetime of the deuterium T centre is over five times longer than the common protium variant. Through explicit first-principles calculations, we demonstrate that this dramatic difference is due to a reduction in the carbon-hydrogen local vibrational mode energy, which suppresses non-radiative decay. Our results imply that the deuterium T centre approaches unit quantum efficiency, enabling more efficient single-photon sources, quantum memories, and entanglement generation. |
| title | Giant Isotope Effect on the Excited-State Lifetime and Emission Efficiency of the Silicon T Centre |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.23862 |