Efficient and reversible optical-to-spin conversion for solid-state quantum memories
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| Format: | Preprint |
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2024
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| _version_ | 1866914316387614720 |
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| author | Chen, Jingjing Afzelius, Mikael |
| author_facet | Chen, Jingjing Afzelius, Mikael |
| contents | Long-duration and efficient quantum memories for photons are key components of quantum repeater and network applications. To achieve long duration storage in atomic systems, a short-lived optical coherence can be mapped into a long-lived spin coherence, which is the basis for many quantum memory schemes. In this work, we present modeling and measurements of the back-and-forth, i.e. reversible, optical-to-spin conversion for an atomic frequency comb memory. The AFC memory is implemented in $^{151}\textrm{Eu}^{3+}:\textrm{Y}_2\textrm{SiO}_5$ with an applied magnetic field of 231 mT, which allows lifting Zeeman transition degeneracy which otherwise cause time-domain interference in the optical-to-spin conversion. By optimizing the conversion using the developed simulation tool, we achieve a total efficiency of up to 96%, including the spin echo sequence and spin dephasing, for a storage time of 500 $μ$s. Our methods and results pave the way for long-duration storage of single photon states in 151Eu3+:Y2SiO5 with high signal-to-noise, at the millisecond timescale. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_14551 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Efficient and reversible optical-to-spin conversion for solid-state quantum memories Chen, Jingjing Afzelius, Mikael Quantum Physics Atomic Physics Long-duration and efficient quantum memories for photons are key components of quantum repeater and network applications. To achieve long duration storage in atomic systems, a short-lived optical coherence can be mapped into a long-lived spin coherence, which is the basis for many quantum memory schemes. In this work, we present modeling and measurements of the back-and-forth, i.e. reversible, optical-to-spin conversion for an atomic frequency comb memory. The AFC memory is implemented in $^{151}\textrm{Eu}^{3+}:\textrm{Y}_2\textrm{SiO}_5$ with an applied magnetic field of 231 mT, which allows lifting Zeeman transition degeneracy which otherwise cause time-domain interference in the optical-to-spin conversion. By optimizing the conversion using the developed simulation tool, we achieve a total efficiency of up to 96%, including the spin echo sequence and spin dephasing, for a storage time of 500 $μ$s. Our methods and results pave the way for long-duration storage of single photon states in 151Eu3+:Y2SiO5 with high signal-to-noise, at the millisecond timescale. |
| title | Efficient and reversible optical-to-spin conversion for solid-state quantum memories |
| topic | Quantum Physics Atomic Physics |
| url | https://arxiv.org/abs/2410.14551 |