Telecom Quantum Photonic Interface for a $^{40}$Ca$^+$ Single-Ion Quantum Memory
Fuente:
arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2022
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| _version_ | 1866913331746439168 |
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| author | Arenskötter, Elena Bauer, Tobias Kucera, Stephan Bock, Matthias Eschner, Jürgen Becher, Christoph |
| author_facet | Arenskötter, Elena Bauer, Tobias Kucera, Stephan Bock, Matthias Eschner, Jürgen Becher, Christoph |
| contents | Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution. Here we present such a photonic interface, designed for connecting a $^{40}$Ca$^+$ single-ion quantum memory to the telecom C-band. The interface combines a memory-resonant, cavity-enhanced spontaneous parametric down-conversion (SPDC) photon pair source with bi-directional polarization-conserving quantum frequency conversion (QFC). We demonstrate preservation of high-fidelity entanglement during conversion, fiber transmission over up to 40 km and back-conversion to the memory wavelength. Even for the longest distance and bi-directional conversion the entanglement fidelity remains larger than 95 % (98 %) without (with) background correction. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2211_08841 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Telecom Quantum Photonic Interface for a $^{40}$Ca$^+$ Single-Ion Quantum Memory Arenskötter, Elena Bauer, Tobias Kucera, Stephan Bock, Matthias Eschner, Jürgen Becher, Christoph Quantum Physics Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution. Here we present such a photonic interface, designed for connecting a $^{40}$Ca$^+$ single-ion quantum memory to the telecom C-band. The interface combines a memory-resonant, cavity-enhanced spontaneous parametric down-conversion (SPDC) photon pair source with bi-directional polarization-conserving quantum frequency conversion (QFC). We demonstrate preservation of high-fidelity entanglement during conversion, fiber transmission over up to 40 km and back-conversion to the memory wavelength. Even for the longest distance and bi-directional conversion the entanglement fidelity remains larger than 95 % (98 %) without (with) background correction. |
| title | Telecom Quantum Photonic Interface for a $^{40}$Ca$^+$ Single-Ion Quantum Memory |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2211.08841 |