Distribution of Time-Bin Entangled Qubits over 50 km of Optical Fiber
Open accessAbstract
We report experimental distribution of time-bin entangled qubits over 50 km of optical fibers. Using actively stabilized preparation and measurement devices we demonstrate violation of the Clauser-Horne-Shimony-Holt Bell inequality by more than 15 standard deviations without removing the detector noise. In addition we report a proof-of principle experiment of quantum key distribution over 50 km of optical fibers using entangled photon.
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In time-bin encoding, a qubit is encoded into two identical wavepackets, which at a given time t are spatially displaced relative to each other.
“In time-bin encoding, a qubit is encoded into two identical wavepackets, which at a given time t are spatially displaced relative to each other.”
From Exactly solvable 2D model for photon propagation in curved space: loss of interference and Bell inequality violation (2022) · cites this paper as [39]
On p. 1, the paper defines the qubit states as photons in a first and a second time bin, produced using an unbalanced interferometer. This supports the two temporally separated components, but our copy does not specify that their wavepackets are identical or describe them as spatially displaced at a given time. (LLM, conf=0.78)
Experimental — accuracy not yet measuredTime-bin encoding has experimentally demonstrated Bell inequality violation by Marcikic et al.
“To generate entanglement, we use time-bin encoding, for which BIV has been experimentally demonstrated by Marcikic et al [39].”
From Exactly solvable 2D model for photon propagation in curved space: loss of interference and Bell inequality violation (2022) · cites this paper as [39]
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References 19 · Cited by 343
Research works printed but not linked: 5
- [3]C. Bennett and G. Brassard, in Proceedings of the IEEE ICCSSP, Bangalore (IEEE, New York, 1984), p.175
- [6]E. Waks et al. , Phys. Rev. A 65 , 052310 (2002), B. C. Jacobs et al. , Phys.Rev.A 66 052307 (2002), D. Collins et al. , submitted, quant-ph/0311101 · arXiv
- [8]M. Aspelmeyer et al. , IEEE J. Sel. Top. Quant. 9 , 1541 (2003)
- [9]A. Beveratos et al. , Phys. Rev. Lett. 89, 187901 (2002)
- [20]R. Sobolewski et al. , IEEE Transactions on applied superconductivity, 13 , 1151 (2003)
- Authors
- Marcikic, I., de Riedmatten, H., Tittel, W., Zbinden, H., Legré, M., & Gisin, N.
- Affiliations
- University of Geneva (CH)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2004-10-28
- Volume
- 93
- Issue
- 18
- Pages
- 180502-180502
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2085176432
- Cited by
- 343
- References
- 19
- Citations by year
- 2026: 17 · 2025: 18 · 2024: 24 · 2023: 16 · 2022: 14 · 2021: 16 · 2020: 15 · 2019: 16 · 2018: 20 · 2017: 16 · 2016: 11 · 2015: 23 · 2014: 18 · 2013: 14 · 2012: 9
- FWCI
- 15.89
- Type
- journal article
- Language
- en
- Open access
- Licence
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- Archive ouverte UNIGE (University of Geneva) (publishedVersion, other-oa)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Semiconductor Quantum Structures and Devices
- Keywords
- optical fiber transmission, Bell inequality violation, CHSH inequality, quantum key distribution, entangled photons
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