Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks

@article{Chou2007FunctionalQN,
  title={Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks},
  author={Chin-wen Chou and Julien Laurat and Hui Deng and Kyung Soo Choi and Hugues de Riedmatten and Daniel Felinto and Harry J. Kimble},
  journal={Science},
  year={2007},
  volume={316},
  pages={1316 - 1320}
}
We demonstrated entanglement distribution between two remote quantum nodes located 3 meters apart. This distribution involves the asynchronous preparation of two pairs of atomic memories and the coherent mapping of stored atomic states into light fields in an effective state of near-maximum polarization entanglement. Entanglement is verified by way of the measured violation of a Bell inequality, and it can be used for communication protocols such as quantum cryptography. The demonstrated… Expand
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References

SHOWING 1-10 OF 51 REFERENCES
Quantum State Transfer and Entanglement Distribution among Distant Nodes in a Quantum Network
We propose a scheme to utilize photons for ideal quantum transmission between atoms located at spatially separated nodes of a quantum network. The transmission protocol employs special laser pulsesExpand
Generation of nonclassical photon pairs for scalable quantum communication with atomic ensembles
TLDR
The first enabling step in the realization of a protocol for scalable long-distance quantum communication and the distribution of entanglement over quantum networks is reported, namely the observation of quantum correlations for photon pairs generated in the collective emission from an atomic ensemble. Expand
Conditional control of the quantum states of remote atomic memories for quantum networking
TLDR
This work reports the first implementation of such conditional control of two atomic memories, located in distinct apparatuses, which results in a 28-fold increase of the probability of simultaneously obtaining a pair of single photons, relative to the case without conditional control. Expand
Quantum Repeaters: The Role of Imperfect Local Operations in Quantum Communication
TLDR
This work presents a scheme of a quantum repeater that connects a string of (imperfect) entangled pairs of particles by using a novel nested purification protocol, thereby creating a single distant pair of high fidelity. Expand
Long-distance quantum communication with atomic ensembles and linear optics
TLDR
It is shown that the communication efficiency scales polynomially with the channel length, and hence the scheme should be operable over very long distances. Expand
Direct measurement of decoherence for entanglement between a photon and stored atomic excitation.
TLDR
An investigation of the Bell violation as a function of the cross correlation between the generated nonclassical fields is reported, with saturation of the violation close to the maximum value allowed by quantum mechanics. Expand
Quantum State Transfer Between Matter and Light
TLDR
This work reports on the coherent quantum state transfer from a two-level atomic system to a single photon that enables implementation of distributed quantum networking. Expand
Observation of entanglement of a single photon with a trapped atom.
TLDR
The detection efficiency and the entanglement fidelity are high enough to allow in a next step the generation of entangled atoms at large distances, ready for a final loophole-free Bell experiment. Expand
Distribution of time-bin entangled qubits over 50 km of optical fiber.
TLDR
Using actively stabilized preparation and measurement devices, violation of the Clauser-Horne-Shimony-Holt Bell inequality is demonstrated by more than 15 standard deviations without removing the detector noise. Expand
Storage and retrieval of single photons transmitted between remote quantum memories
TLDR
The generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles is reported, an important step towards distributed quantum networks. Expand
...
1
2
3
4
5
...