Quantum repeaters based on atomic ensembles and linear optics

By Nicolas Sangouard, C. Simon, Hugues de Riedmatten, Nicolas Gisin. 2009

1,698 citations recorded by the source corpus.

The distribution of quantum states over long distances is limited by photon loss. Straightforward amplification as in classical telecommunications is not an option in quantum communication because of the no-cloning theorem. This problem could be overcome by implementing quantum repeater protocols, which create long-distance entanglement from shorter-distance entanglement via entanglement swapping. Such protocols require the capacity to create entanglement in a heralded fashion, to store it in quantum memories, and to swap it. One attractive general strategy for realizing quantum repeaters is based on the use of atomic ensembles as quantum memories, in combination with linear optical techniques and photon counting to perform all required operations. Here the theoretical and experimental status quo of this very active field are reviewed. The potentials of different approaches are compared quantitatively, with a focus on the most immediate goal of outperforming the direct transmission of photons.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/4dcdaf0c572e3b7dee823ee774ecf4a0e9b0d592

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

A link layer protocol for quantum networks (2019, methodology): “We focus on a high level summary of devices in a quantum network without delving into detailed physics (for more details, see [7, 89, 101] and Section 4.”
A Survey on Quantum Channel Capacities (2018, background): “For research results on quantum repeaters see [32], [74], [90], [150], [254], [289], [309], [330-332], [455], [520, 521, 522, 523], and [563].”
Quantum computing with neutral atoms (2020, background): “ch a quantum memory could be used for the distribution of quantum information over large distances, which represents a great challenge due to photon loss. Several so-called quantum repeater protocols [92,93] based on atomic ensemble memories have been proposed to overcome this challenge, and experim”
Towards high-speed optical quantum memories (2009, background): “Recent developments in sources, detectors, gates and protocols have laid the ground for the construction of large-scale photonic quantum computers with unique capabilities [1, 10], as well as inter-continental quantum networks that are immune to eavesdropping [11].”
Quantum memories: emerging applications and recent advances (2015, background): “terfaces for building elements in optical quantum information processing. Their applications now extend [7] far beyond their initial role in long-distance quantum communication based on linear optics [8]. In this review, we focused on recent experimental and theoretical developments in implementing ”
Cavity-based quantum networks with single atoms and optical photons (2014, background): “Here, proposals for long-distance communication (Duan et al., 2001) and quantum information processing based on dipole blockade (Lukin et al., 2001) exist and remarkable progress has been made (Hammerer et al., 2010; Sangouard et al., 2011).”
Quantum teleportation across a metropolitan fibre network (2016, background): “Our demonstration establishes an important requirement for quantum repeater-based communications [7] and constitutes a milestone on the path to a global quantum Internet [8].”
Secure quantum key distribution with realistic devices (2020, background): “…et al., 2018; Weedbrook et al., 2012), highdimensional QKD (Xavier and Lima, 2020), quantum repeaters (Munro et al., 2015; Pan et al., 2012; Sangouard et al., 2011), quantum Internet (Kimble, 2008; Wehner 15 https://www.etsi.org/images/files/ETSIWhitePapers/ 8 TABLE II List of quantum…”
An elementary quantum network of single atoms in optical cavities (2012, background): “An intensely studied example are ensembles of gas-phase atoms [12–14], but the protocols for the generation of single excitations are inherently probabilistic [9].”