Digital reconstruction of squeezed light for quantum information processing
Abstract Squeezed light plays a vital role in quantum information processing. However, its highly sensitive nature presents significant practical challenges, particularly in remote detection, which traditionally requires complex systems such as active phase locking, clock synchronization, and polari...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-05-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-025-01018-9 |
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| author | Huy Q. Nguyen Ivan Derkach Adnan A. E. Hajomer Hou-Man Chin Akash nag Oruganti Ulrik L. Andersen Vladyslav Usenko Tobias Gehring |
| author_facet | Huy Q. Nguyen Ivan Derkach Adnan A. E. Hajomer Hou-Man Chin Akash nag Oruganti Ulrik L. Andersen Vladyslav Usenko Tobias Gehring |
| author_sort | Huy Q. Nguyen |
| collection | DOAJ |
| description | Abstract Squeezed light plays a vital role in quantum information processing. However, its highly sensitive nature presents significant practical challenges, particularly in remote detection, which traditionally requires complex systems such as active phase locking, clock synchronization, and polarization control. Here, we propose and demonstrate an asynchronous detection method for squeezed light eliminating the need for these complex systems. By employing radio-frequency heterodyne detection with a locally generated local oscillator and applying a series of digital unitary transformations, we successfully reconstruct squeezed states of light. We validate our approach in two key applications: the distribution of squeezed light over a 10 km fiber channel, and passive continuous-variables quantum key distribution based on squeezed vacuum states between two labs connected via deployed fiber. This demonstrates a practical digital reconstruction method for squeezed light, opening new avenues for practical distributed quantum sensing networks and high-performance, long-distance quantum communication using squeezed states. |
| format | Article |
| id | doaj-art-b20aa3cf689f4702a97642785f66947b |
| institution | OA Journals |
| issn | 2056-6387 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj-art-b20aa3cf689f4702a97642785f66947b2025-08-20T01:47:32ZengNature Portfolionpj Quantum Information2056-63872025-05-011111810.1038/s41534-025-01018-9Digital reconstruction of squeezed light for quantum information processingHuy Q. Nguyen0Ivan Derkach1Adnan A. E. Hajomer2Hou-Man Chin3Akash nag Oruganti4Ulrik L. Andersen5Vladyslav Usenko6Tobias Gehring7Center for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of DenmarkDepartment of Optics, Faculty of Science, Palacky UniversityCenter for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of DenmarkCenter for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of DenmarkDepartment of Optics, Faculty of Science, Palacky UniversityCenter for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of DenmarkDepartment of Optics, Faculty of Science, Palacky UniversityCenter for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of DenmarkAbstract Squeezed light plays a vital role in quantum information processing. However, its highly sensitive nature presents significant practical challenges, particularly in remote detection, which traditionally requires complex systems such as active phase locking, clock synchronization, and polarization control. Here, we propose and demonstrate an asynchronous detection method for squeezed light eliminating the need for these complex systems. By employing radio-frequency heterodyne detection with a locally generated local oscillator and applying a series of digital unitary transformations, we successfully reconstruct squeezed states of light. We validate our approach in two key applications: the distribution of squeezed light over a 10 km fiber channel, and passive continuous-variables quantum key distribution based on squeezed vacuum states between two labs connected via deployed fiber. This demonstrates a practical digital reconstruction method for squeezed light, opening new avenues for practical distributed quantum sensing networks and high-performance, long-distance quantum communication using squeezed states.https://doi.org/10.1038/s41534-025-01018-9 |
| spellingShingle | Huy Q. Nguyen Ivan Derkach Adnan A. E. Hajomer Hou-Man Chin Akash nag Oruganti Ulrik L. Andersen Vladyslav Usenko Tobias Gehring Digital reconstruction of squeezed light for quantum information processing npj Quantum Information |
| title | Digital reconstruction of squeezed light for quantum information processing |
| title_full | Digital reconstruction of squeezed light for quantum information processing |
| title_fullStr | Digital reconstruction of squeezed light for quantum information processing |
| title_full_unstemmed | Digital reconstruction of squeezed light for quantum information processing |
| title_short | Digital reconstruction of squeezed light for quantum information processing |
| title_sort | digital reconstruction of squeezed light for quantum information processing |
| url | https://doi.org/10.1038/s41534-025-01018-9 |
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