Fundamental Limits on Polarization Entanglement Distribution in Optical Fiber
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arXiv
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866915835183890432 |
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| author | Pirandola, Stefano |
| author_facet | Pirandola, Stefano |
| contents | Characterizing the ultimate rates of entanglement distribution is essential for both foundational research and the practical deployment of quantum technologies. To investigate these limits, we introduce an erasure-Pauli channel model describing the distribution of polarization entanglement in optical fiber. For this channel, we derive bounds on the rates of entanglement distribution and related quantum resources under optimal local operations and two-way classical communication (two-way assisted capacities). This framework allows us to determine the optimal repeaterless performance achievable over realistic optical fibers affected by polarization mode dispersion, thereby providing a rigorous benchmark for long-distance polarization-based quantum communication. Finally, we show that both our model and capacity bounds remain robust under the inclusion of detector dark counts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_04502 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Fundamental Limits on Polarization Entanglement Distribution in Optical Fiber Pirandola, Stefano Quantum Physics Other Condensed Matter Applied Physics Instrumentation and Detectors Optics Characterizing the ultimate rates of entanglement distribution is essential for both foundational research and the practical deployment of quantum technologies. To investigate these limits, we introduce an erasure-Pauli channel model describing the distribution of polarization entanglement in optical fiber. For this channel, we derive bounds on the rates of entanglement distribution and related quantum resources under optimal local operations and two-way classical communication (two-way assisted capacities). This framework allows us to determine the optimal repeaterless performance achievable over realistic optical fibers affected by polarization mode dispersion, thereby providing a rigorous benchmark for long-distance polarization-based quantum communication. Finally, we show that both our model and capacity bounds remain robust under the inclusion of detector dark counts. |
| title | Fundamental Limits on Polarization Entanglement Distribution in Optical Fiber |
| topic | Quantum Physics Other Condensed Matter Applied Physics Instrumentation and Detectors Optics |
| url | https://arxiv.org/abs/2603.04502 |