Building a controlled-NOT gate between polarization and frequency
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866908016910008320 |
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| author | Lu, Hsuan-Hao Lukens, Joseph M. Alshowkan, Muneer Kirby, Brian T. Peters, Nicholas A. |
| author_facet | Lu, Hsuan-Hao Lukens, Joseph M. Alshowkan, Muneer Kirby, Brian T. Peters, Nicholas A. |
| contents | By harnessing multiple degrees of freedom (DoFs) within a single photon, controlled quantum unitaries, such as the two-qubit controlled-NOT (CNOT) gate, play a pivotal role in advancing quantum communication protocols like dense coding and entanglement distillation. In this work, we devise and realize a CNOT operation between polarization and frequency DoFs by exploiting directionally dependent electro-optic phase modulation within a fiber Sagnac loop. Alongside computational basis measurements, we validate the effectiveness of this operation through the synthesis of all four Bell states in a single photon, all with fidelities greater than 98%. This demonstration opens new avenues for manipulating hyperentanglement across these two crucial DoFs, marking a foundational step toward leveraging polarization-frequency resources in fiber networks for future quantum applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07317 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Building a controlled-NOT gate between polarization and frequency Lu, Hsuan-Hao Lukens, Joseph M. Alshowkan, Muneer Kirby, Brian T. Peters, Nicholas A. Quantum Physics Optics By harnessing multiple degrees of freedom (DoFs) within a single photon, controlled quantum unitaries, such as the two-qubit controlled-NOT (CNOT) gate, play a pivotal role in advancing quantum communication protocols like dense coding and entanglement distillation. In this work, we devise and realize a CNOT operation between polarization and frequency DoFs by exploiting directionally dependent electro-optic phase modulation within a fiber Sagnac loop. Alongside computational basis measurements, we validate the effectiveness of this operation through the synthesis of all four Bell states in a single photon, all with fidelities greater than 98%. This demonstration opens new avenues for manipulating hyperentanglement across these two crucial DoFs, marking a foundational step toward leveraging polarization-frequency resources in fiber networks for future quantum applications. |
| title | Building a controlled-NOT gate between polarization and frequency |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2404.07317 |