High-dimensional autocompensating discrete modulation CV-QKD protocol in optical fibers
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866916898576269312 |
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| author | Vázquez-Martínez, Alexandre Prieto-Blanco, Xesús Mateo, Eduardo F. Liñares, Jesús |
| author_facet | Vázquez-Martínez, Alexandre Prieto-Blanco, Xesús Mateo, Eduardo F. Liñares, Jesús |
| contents | In this work we present a high-dimensional discrete modulated CV-QKD protocol, with dimension 2N , in optical fibers, where N is the number of optical modes. We use N-dimensional product states of weak coherent states that undergo perturbations along optical fibers and that are cancelled in a passive way (autocompensation) and then measured by a standard balanced homodyne detection. We analyze the security of this high-dimensional protocol when an intercept and resend attack is implemented with simultaneous homodyne measurement in both quadratures and the resulting secure key gains are calculated showing a significative increase with dimension. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_10442 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-dimensional autocompensating discrete modulation CV-QKD protocol in optical fibers Vázquez-Martínez, Alexandre Prieto-Blanco, Xesús Mateo, Eduardo F. Liñares, Jesús Quantum Physics Optics In this work we present a high-dimensional discrete modulated CV-QKD protocol, with dimension 2N , in optical fibers, where N is the number of optical modes. We use N-dimensional product states of weak coherent states that undergo perturbations along optical fibers and that are cancelled in a passive way (autocompensation) and then measured by a standard balanced homodyne detection. We analyze the security of this high-dimensional protocol when an intercept and resend attack is implemented with simultaneous homodyne measurement in both quadratures and the resulting secure key gains are calculated showing a significative increase with dimension. |
| title | High-dimensional autocompensating discrete modulation CV-QKD protocol in optical fibers |
| topic | Quantum Physics Optics |
| url | https://arxiv.org/abs/2508.10442 |