Experimental Entanglement Swapping: Entangling Photons That Never Interacted

Pan, Jian-Wei; Bouwmeester, Dirk; Weinfurter, Harald; Zeilinger, Anton

doi:10.1103/physrevlett.80.3891

Cited by 1,213 publications

(898 citation statements)

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“…We discuss, briefly and without entering into technical details, natural extensions of our teleportation scheme, i.e., teleportation of an entangled state [4] and the so-called entanglement swapping [24]. For the case of teleportation of an entangled state we need initially two pairs of ions, each pair in a different trap.…”

Section: Entanglement Teleportation and Entanglement Swappingmentioning

confidence: 99%

Reliable teleportation in trapped ions

Solano

Cesar

Filho

et al. 2001

The European Physical Journal D

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Abstract. We study a method for the implementation of a reliable teleportation protocol (theoretically, 100% of success) of internal states in trapped ions. The generation of the quantum channel (any of four Bell states) may be done respecting technical limitations on individual addressing and without claiming the Lamb-Dicke regime. An adequate Bell analyzer, that transforms unitarily the Bell basis into a completely disentangled one, is considered. Probable sources of error and fidelity estimations of the teleportation process are studied. Finally, we discuss experimental issues, proposing a scenario in which the present scheme could be implemented.

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Section: Entanglement Teleportation and Entanglement Swappingmentioning

confidence: 99%

Reliable teleportation in trapped ions

Solano

Cesar

Filho

et al. 2001

The European Physical Journal D

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“…Teleportation of a subsystem of an entangled pair translates itself into the protocol of entanglement swapping [22][23][24][25] where two remote particles can become entangled without direct interactions. Further, teleportation of quantum logic gates, a key element in distributed quantum computing schemes, is also possible assisted by shared multiparticle entangled states 5,6 .…”

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confidence: 99%

Ground-to-satellite quantum teleportation

Ren

Yong

et al. 2017

Nature

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621

371

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An arbitrary unknown quantum state cannot be precisely measured or perfectly replicated. However, quantum teleportation allows faithful transfer of unknown quantum states from one object to another over long distance, without physical travelling of the object itself. Long-distance teleportation has been recognized as a fundamental element in protocols such as large-scale quantum networks and distributed quantum computation. However, the previous teleportation experiments between distant locations were limited to a distance on the order of 100 kilometers, due to photon loss in optical fibres or terrestrial free-space channels. An outstanding open challenge for a global-scale "quantum internet" is to significantly extend the range for teleportation. A promising solution to this problem is exploiting satellite platform and space-based link, which can conveniently connect two remote points on the Earth with greatly reduced channel loss because most of the photons' propagation path is in empty space. Here, we report the first quantum teleportation of independent single-photon qubits from a ground observatory to a low Earth orbit satellite - through an up-link channel - with a distance up to 1400 km. To optimize the link efficiency and overcome the atmospheric turbulence in the up-link, a series of techniques are developed, including a compact ultra-bright source of multi-photon entanglement, narrow beam divergence, high-bandwidth and high-accuracy acquiring, pointing, and tracking (APT). We demonstrate successful quantum teleportation for six input states in mutually unbiased bases with an average fidelity of 0.80+/-0.01, well above the classical limit. This work establishes the first ground-to-satellite up-link for faithful and ultra-long-distance quantum teleportation, an essential step toward global-scale quantum internet.Comment: 16 pages, 3 figure

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“…But today we see a growing number of remarkable experiments mastering entanglement. Entanglement over long distances [11,12,13,19,33], entanglement between many photons [34] and many ions [35], entanglement of an ion and a photon [36,37], entanglement of mesoscopic systems (more precisely entanglement between a few collective modes carried by many particles) [38,39,40], entanglement swapping [41,42,43], the transfer of entanglement between different carriers [44], etc.…”

Section: Entanglement As a Cause Of Correlationmentioning

confidence: 99%

Can Relativity be Considered Complete? From Newtonian Nonlocality to Quantum Nonlocality and Beyond

Gisin

2015

Lecture Notes in Physics

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We review the long history of nonlocality in physics with special emphasis on the conceptual breakthroughs over the last few years. For the first time it is possible to study "nonlocality without signaling" from the outside, that is without all the quantum physics Hilbert space artillery. We emphasize that physics has always given a nonlocal description of Nature, except during a short 10 years gap. We note that the very concept of "nonlocality without signaling" is totally foreign to the spirit of relativity, the only strictly local theory.

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Experimental Entanglement Swapping: Entangling Photons That Never Interacted

Cited by 1,213 publications

References 20 publications

Reliable teleportation in trapped ions

Reliable teleportation in trapped ions

Ground-to-satellite quantum teleportation

Can Relativity be Considered Complete? From Newtonian Nonlocality to Quantum Nonlocality and Beyond

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