Massive-mode polarization entangled biphoton frequency comb
Abstract A frequency-multiplexed entangled photon pair and a high-dimensional hyperentangled photon pair are useful to realize a high-capacity quantum communication. A biphoton frequency comb (BFC) with entanglement can be used to prepare both states. We demonstrate polarization entangled BFCs with...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-12691-7 |
| _version_ | 1818213808305340416 |
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| author | Tomohiro Yamazaki Rikizo Ikuta Toshiki Kobayashi Shigehito Miki Fumihiro China Hirotaka Terai Nobuyuki Imoto Takashi Yamamoto |
| author_facet | Tomohiro Yamazaki Rikizo Ikuta Toshiki Kobayashi Shigehito Miki Fumihiro China Hirotaka Terai Nobuyuki Imoto Takashi Yamamoto |
| author_sort | Tomohiro Yamazaki |
| collection | DOAJ |
| description | Abstract A frequency-multiplexed entangled photon pair and a high-dimensional hyperentangled photon pair are useful to realize a high-capacity quantum communication. A biphoton frequency comb (BFC) with entanglement can be used to prepare both states. We demonstrate polarization entangled BFCs with over 1400 frequency modes, which is approximately two orders of magnitude larger than those of earlier entangled BFCs, by placing a singly resonant periodically poled LiNbO3 waveguide resonator within a Sagnac loop. The BFCs are demonstrated by measuring the joint spectral intensity, cross-correlation, and autocorrelation. Moreover, the polarization entanglement at representative groups of frequency modes is verified by quantum state tomography, where each fidelity is over 0.7. The efficient generation of a massive-mode entangled BFC is expected to accelerate the increase of capacity in quantum communication. |
| first_indexed | 2024-12-12T06:10:10Z |
| format | Article |
| id | doaj.art-3698ef9b28a84747b741cfd907139c58 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-12T06:10:10Z |
| publishDate | 2022-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-3698ef9b28a84747b741cfd907139c582022-12-22T00:35:10ZengNature PortfolioScientific Reports2045-23222022-05-011211810.1038/s41598-022-12691-7Massive-mode polarization entangled biphoton frequency combTomohiro Yamazaki0Rikizo Ikuta1Toshiki Kobayashi2Shigehito Miki3Fumihiro China4Hirotaka Terai5Nobuyuki Imoto6Takashi Yamamoto7Graduate School of Engineering Science, Osaka UniversityGraduate School of Engineering Science, Osaka UniversityGraduate School of Engineering Science, Osaka UniversityAdvanced ICT Research Institute, National Institute of Information and Communications Technology (NICT)Advanced ICT Research Institute, National Institute of Information and Communications Technology (NICT)Advanced ICT Research Institute, National Institute of Information and Communications Technology (NICT)Center for Quantum Information and Quantum Biology, Osaka UniversityGraduate School of Engineering Science, Osaka UniversityAbstract A frequency-multiplexed entangled photon pair and a high-dimensional hyperentangled photon pair are useful to realize a high-capacity quantum communication. A biphoton frequency comb (BFC) with entanglement can be used to prepare both states. We demonstrate polarization entangled BFCs with over 1400 frequency modes, which is approximately two orders of magnitude larger than those of earlier entangled BFCs, by placing a singly resonant periodically poled LiNbO3 waveguide resonator within a Sagnac loop. The BFCs are demonstrated by measuring the joint spectral intensity, cross-correlation, and autocorrelation. Moreover, the polarization entanglement at representative groups of frequency modes is verified by quantum state tomography, where each fidelity is over 0.7. The efficient generation of a massive-mode entangled BFC is expected to accelerate the increase of capacity in quantum communication.https://doi.org/10.1038/s41598-022-12691-7 |
| spellingShingle | Tomohiro Yamazaki Rikizo Ikuta Toshiki Kobayashi Shigehito Miki Fumihiro China Hirotaka Terai Nobuyuki Imoto Takashi Yamamoto Massive-mode polarization entangled biphoton frequency comb Scientific Reports |
| title | Massive-mode polarization entangled biphoton frequency comb |
| title_full | Massive-mode polarization entangled biphoton frequency comb |
| title_fullStr | Massive-mode polarization entangled biphoton frequency comb |
| title_full_unstemmed | Massive-mode polarization entangled biphoton frequency comb |
| title_short | Massive-mode polarization entangled biphoton frequency comb |
| title_sort | massive mode polarization entangled biphoton frequency comb |
| url | https://doi.org/10.1038/s41598-022-12691-7 |
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