Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
By F. Bussières, C. Clausen, A. Tiranov, B. Korzh, V. Verma, Sae Woo Nam, F. Marsili, A. Ferrier, P. Goldner, H. Herrmann and 4 more. Nature Photonics, 2014
265 citations recorded by the source corpus.
Quantum teleportation of the state of a qubit encoded in the polarization state is demonstrated from a telecom-wavelength photon to a solid-state quantum memory via 24.8 km of optical fibre. It is the longest distance ever reached in a teleportation experiment involving a quantum memory. Quantum teleportation1 is a cornerstone of quantum information science due to its essential role in important tasks such as the long-distance transmission of quantum information using quantum repeaters2,3. This requires the efficient distribution of entanglement between remote nodes of a network4. Here, we demonstrate quantum teleportation of the polarization state of a telecom-wavelength photon onto the state of a solid-state quantum memory. Entanglement is established between a rare-earth-ion-doped crystal storing a single photon that is polarization-entangled with a flying telecom-wavelength photon5,6. The latter is jointly measured with another flying polarization qubit to be teleported, which heralds the teleportation. The fidelity of the qubit retrieved from the memory is shown to be greater than the maximum fidelity achievable without entanglement, even when the combined distances travelled by the two flying qubits is 25 km of standard optical fibre. Our results demonstrate the possibility of long-distance quantum networks with solid-state resources.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/c7233f0db2efd7b5386de400e78717b056c27d16
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Citations in the corpus
- Practical challenges in quantum key distribution (2016, unknown): “145,146 However, new recent approaches manage to reduce the need for a quantum memory 147 or to completely remove it by using all-photonic quantum repeaters.”
- Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre (2014, background): “5%[17], an efficiency of 56%[18], more than 5 GHz bandwidth[22], the possibility to store a large number of temporal and spectral modes[19–21], recall on demand[17] and feed-forward control[21], waveform preserving storage[21], and the possibilities to store members of entangled photon pairs[22, 22]”
- Quantum teleportation across a metropolitan fibre network (2016, methodology): “In all other demonstrations, either the travel distances of the two photons were small, or they were artificially increased using fibre on spool [9, 15, 16], effectively increasing travel time and transmission loss — and hence decreasing communication rates — rather than real separation.”
- Photonic quantum information processing: A concise review (2019, unknown): “50–55.”