Long-distance teleportation of qubits at telecommunication wavelengths
Open accessAbstract
Matter and energy cannot be teleported (that is, transferred from one place to another without passing through intermediate locations). However, teleportation of quantum states (the ultimate structure of objects) is possible: only the structure is teleported--the matter stays at the source side and must be already present at the final location. Several table-top experiments have used qubits (two-dimensional quantum systems) or continuous variables to demonstrate the principle over short distances. Here we report a long-distance experimental demonstration of probabilistic quantum teleportation. Qubits carried by photons of 1.3 micro m wavelength are teleported onto photons of 1.55 micro m wavelength from one laboratory to another, separated by 55 m but connected by 2 km of standard telecommunications fibre. The first (and, with foreseeable technologies, the only) application of quantum teleportation is in quantum communication, where it could help to extend quantum cryptography to larger distances.
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In the Pan et al. (2003a) scheme, the entangled ancillary pair was provided much more frequently than the photon to be teleported, so when a qubit arrived the teleportation machinery was almost always ready.
“The basic idea of this experimental method is that the entangled ancillary pair was provided much more frequently than the photon to be teleported [a similar idea was also used in the teleportation experiment using time-bin entanglement carried out by Marcikic et al. (2003)].Thus, when a qubit which was to be teleported arrived the teleportation machinery was almost always ready.”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Marcikic et al. (2003)
The Experimental Realization section (p. 4) says the experiment decreased the probability of creating entangled qubits relative to the probability of creating the qubit to be teleported. That is the opposite of providing the ancillary pair much more frequently so it would almost always be ready when a qubit arrived. (LLM, conf=0.94)
Checked by a reasoning model — may be wrong.
Experimental — accuracy not yet measuredQuantum teleportation became an experimental reality with four-photon interferometries.
“Quantum teleportation-the transfer and reconstruction of quantum states over arbitrary distances became an experimental reality with four-photon interferometries (Bouwmeester et al. 1997, Marcikic et al. 2003).”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Marcikic et al. 2003
The Conclusion (p. 6) reports an experimental demonstration of quantum teleportation. But the Experimental Realization (pp. 3–4) describes removing one photon from a generated pair and counting the laser pulse in its four-fold coincidences; it does not describe the demonstration as a four-photon interferometry experiment. The experimental-teleportation part is supported, but that specific characterization is not. (LLM, conf=0.86)
Experimental — accuracy not yet measuredMarcikic et al. (2003) realized teleportation of qubits at telecommunication wavelengths over a fiber length of 2 km.
“Marcikic et al. (2003) realized a teleportation of qubits at telecommunication wavelengths over a fiber length of 2 km.”
From Multiphoton entanglement and interferometry (2012) · cites this paper as Marcikic et al. (2003)
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Cites
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Cited by
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- Authors
- Marcikic, I., de Riedmatten, H., Tittel, W., Zbinden, H., & Gisin, N.
- Affiliations
- University of Geneva (CH)
- Corresponding author
- Gisin, N.
- Venue
- Nature
- Published
- 2003-01
- Volume
- 421
- Issue
- 6922
- Pages
- 509-513
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2049968417
- Cited by
- 528
- References
- 7
- Citations by year
- 2026: 13 · 2025: 16 · 2024: 25 · 2023: 51 · 2022: 25 · 2021: 21 · 2020: 18 · 2019: 13 · 2018: 19 · 2017: 15 · 2016: 23 · 2015: 21 · 2014: 24 · 2013: 20 · 2012: 19
- FWCI
- 36.93
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- Archive ouverte UNIGE (University of Geneva) (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- RePEc: Research Papers in Economics (submittedVersion)
- Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum optics and atomic interactions
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum Mechanics and Applications
- Keywords
- quantum teleportation, qubits, telecom wavelengths, probabilistic teleportation, quantum communication, quantum cryptography
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