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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.08167 |
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| _version_ | 1866916283679768576 |
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| author | Das, Antariksha Askarani, Mohsen Falamarzi Davidson, Jacob H. Sinclair, Neil Slater, Joshua A. Marzban, Sara Oblak, Daniel Thiel, Charles W. Cone, Rufus L. Tittel, Wolfgang |
| author_facet | Das, Antariksha Askarani, Mohsen Falamarzi Davidson, Jacob H. Sinclair, Neil Slater, Joshua A. Marzban, Sara Oblak, Daniel Thiel, Charles W. Cone, Rufus L. Tittel, Wolfgang |
| contents | Rare-earth ion-doped crystals are of great interest for quantum memories, a central component in future quantum repeaters. To assess the promise of 1$\%$ Tm$^{3+}$-doped yttrium gallium garnet (Tm:YGG), we report measurements of optical coherence and energy-level lifetimes of its $^3$H$_6$ $\leftrightarrow$ $^3$H$_4$ transition at a temperature of around 500 mK and various magnetic fields. Using spectral hole burning, we find hyperfine ground-level (Zeeman level) lifetimes of several minutes at magnetic fields of less than 1000 G. We also measure coherence time exceeding one millisecond using two-pulse photon echoes. Three-pulse photon echo and spectral hole burning measurements reveal that due to spectral diffusion, the effective coherence time reduces to a few $μ$s over a timescale of around two hundred seconds. Finally, temporal and frequency-multiplexed storage of optical pulses using the atomic frequency comb protocol is demonstrated. Our results suggest Tm:YGG to be promising for multiplexed photonic quantum memory for quantum repeaters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_08167 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Optical Investigations of Coherence and Relaxation Dynamics of a Thulium-doped Yttrium Gallium Garnet Crystal at sub-Kelvin Temperatures for Optical Quantum Memory Das, Antariksha Askarani, Mohsen Falamarzi Davidson, Jacob H. Sinclair, Neil Slater, Joshua A. Marzban, Sara Oblak, Daniel Thiel, Charles W. Cone, Rufus L. Tittel, Wolfgang Quantum Physics Applied Physics Optics Rare-earth ion-doped crystals are of great interest for quantum memories, a central component in future quantum repeaters. To assess the promise of 1$\%$ Tm$^{3+}$-doped yttrium gallium garnet (Tm:YGG), we report measurements of optical coherence and energy-level lifetimes of its $^3$H$_6$ $\leftrightarrow$ $^3$H$_4$ transition at a temperature of around 500 mK and various magnetic fields. Using spectral hole burning, we find hyperfine ground-level (Zeeman level) lifetimes of several minutes at magnetic fields of less than 1000 G. We also measure coherence time exceeding one millisecond using two-pulse photon echoes. Three-pulse photon echo and spectral hole burning measurements reveal that due to spectral diffusion, the effective coherence time reduces to a few $μ$s over a timescale of around two hundred seconds. Finally, temporal and frequency-multiplexed storage of optical pulses using the atomic frequency comb protocol is demonstrated. Our results suggest Tm:YGG to be promising for multiplexed photonic quantum memory for quantum repeaters. |
| title | Optical Investigations of Coherence and Relaxation Dynamics of a Thulium-doped Yttrium Gallium Garnet Crystal at sub-Kelvin Temperatures for Optical Quantum Memory |
| topic | Quantum Physics Applied Physics Optics |
| url | https://arxiv.org/abs/2406.08167 |