Bichromatic Quantum Teleportation of Weak Coherent Polarization States on a Metropolitan Fiber
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arXiv
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| Autori principali: | , , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914337594015744 |
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| author | Borowska, Zofia A. Andrewski, Shane De Pascalis, Giorgio Brasher, Olivia Flament, Mael Craddock, Alexander N. Bigagli, Niccolò Döring, Ronny Ritter, Michaela Braun, Ralf-Peter Jons, Klaus Geitz, Marc Holschke, Oliver Sena, Matheus Namazi, Mehdi |
| author_facet | Borowska, Zofia A. Andrewski, Shane De Pascalis, Giorgio Brasher, Olivia Flament, Mael Craddock, Alexander N. Bigagli, Niccolò Döring, Ronny Ritter, Michaela Braun, Ralf-Peter Jons, Klaus Geitz, Marc Holschke, Oliver Sena, Matheus Namazi, Mehdi |
| contents | As quantum technologies mature, telecommunication operators have a clear opportunity to unlock and scale new services by providing the connectivity layer that links quantum computers, sensors, clocks, and other quantum devices. Realizing this opportunity requires demonstrating quantum networking protocols, including quantum teleportation, under real-world conditions on existing telecom infrastructure. In this work, we demonstrate quantum teleportation over Deutsche Telekom's metropolitan fiber testbed in Berlin using commercial components deployed at the telecom datacenter. A local Bell-state measurement between 795 nm photons from a weak coherent source and from a bichromatic warm-atom entangled photon source enables conditional state transfer onto an O-band photon, which is transmitted through a 30-km field-deployed fiber loop under real-world environmental conditions. The teleported state is reconstructed after propagation via state tomography, achieving an average teleportation fidelity of 90\% on the deployed link. System performance is evaluated in both the absence and the presence of co-propagating C-band classical traffic within the same fiber, demonstrating compatibility with wavelength-division multiplexed telecom infrastructure carrying live data channels. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_16613 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Bichromatic Quantum Teleportation of Weak Coherent Polarization States on a Metropolitan Fiber Borowska, Zofia A. Andrewski, Shane De Pascalis, Giorgio Brasher, Olivia Flament, Mael Craddock, Alexander N. Bigagli, Niccolò Döring, Ronny Ritter, Michaela Braun, Ralf-Peter Jons, Klaus Geitz, Marc Holschke, Oliver Sena, Matheus Namazi, Mehdi Quantum Physics As quantum technologies mature, telecommunication operators have a clear opportunity to unlock and scale new services by providing the connectivity layer that links quantum computers, sensors, clocks, and other quantum devices. Realizing this opportunity requires demonstrating quantum networking protocols, including quantum teleportation, under real-world conditions on existing telecom infrastructure. In this work, we demonstrate quantum teleportation over Deutsche Telekom's metropolitan fiber testbed in Berlin using commercial components deployed at the telecom datacenter. A local Bell-state measurement between 795 nm photons from a weak coherent source and from a bichromatic warm-atom entangled photon source enables conditional state transfer onto an O-band photon, which is transmitted through a 30-km field-deployed fiber loop under real-world environmental conditions. The teleported state is reconstructed after propagation via state tomography, achieving an average teleportation fidelity of 90\% on the deployed link. System performance is evaluated in both the absence and the presence of co-propagating C-band classical traffic within the same fiber, demonstrating compatibility with wavelength-division multiplexed telecom infrastructure carrying live data channels. |
| title | Bichromatic Quantum Teleportation of Weak Coherent Polarization States on a Metropolitan Fiber |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2602.16613 |