Faithful quantum teleportation via a nanophotonic nonlinear Bell state analyzer
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866912339799834624 |
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| author | Akin, Joshua Zhao, Yunlei Kwiat, Paul G. Goldschmidt, Elizabeth A. Fang, Kejie |
| author_facet | Akin, Joshua Zhao, Yunlei Kwiat, Paul G. Goldschmidt, Elizabeth A. Fang, Kejie |
| contents | Quantum networking protocols, including quantum teleportation and entanglement swapping, use linear-optical Bell state measurements for heralding the distribution and transfer of quantum information. However, a linear-optical Bell state measurement requires identical photons and is susceptible to errors caused by multiphoton emission, fundamentally limiting the efficiency and fidelity of quantum networking protocols. Here we show a nonlinear Bell state analyzer for time-bin encoded photons based on a nanophotonic cavity with efficient sum-frequency generation to filter multiphoton emissions, and utilize it for faithful quantum teleportation involving spectrally distinct photons with fidelities $\geq 94\%$ down to the single-photon level. Our result demonstrates that nonlinear-optical entangling operations, empowered by our efficient nanophotonics platform, can realize faithful quantum information protocols without requiring identical photons and without the fundamental limit on the efficiency and fidelity of a Bell state measurement imposed by linear optics, which facilitates the realization of practical quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_15437 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Faithful quantum teleportation via a nanophotonic nonlinear Bell state analyzer Akin, Joshua Zhao, Yunlei Kwiat, Paul G. Goldschmidt, Elizabeth A. Fang, Kejie Quantum Physics Optics Quantum networking protocols, including quantum teleportation and entanglement swapping, use linear-optical Bell state measurements for heralding the distribution and transfer of quantum information. However, a linear-optical Bell state measurement requires identical photons and is susceptible to errors caused by multiphoton emission, fundamentally limiting the efficiency and fidelity of quantum networking protocols. Here we show a nonlinear Bell state analyzer for time-bin encoded photons based on a nanophotonic cavity with efficient sum-frequency generation to filter multiphoton emissions, and utilize it for faithful quantum teleportation involving spectrally distinct photons with fidelities $\geq 94\%$ down to the single-photon level. Our result demonstrates that nonlinear-optical entangling operations, empowered by our efficient nanophotonics platform, can realize faithful quantum information protocols without requiring identical photons and without the fundamental limit on the efficiency and fidelity of a Bell state measurement imposed by linear optics, which facilitates the realization of practical quantum networks. |
| title | Faithful quantum teleportation via a nanophotonic nonlinear Bell state analyzer |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2411.15437 |