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32.30.+s Entanglement swapping

An integrated quantum repeater at telecom wavelength with single atoms in optical fiber cavities

Tue, 2016-05-31 14:22 - Stephan Ritter
Date: 
2016-03-10
Author(s): 

Manuel Uphoff, Manuel Brekenfeld, Gerhard Rempe, Stephan Ritter

Reference: 

Appl. Phys. B 122, 46 (2016)

URL: 

http://dx.doi.org/10.1007/s00340-015-6299-2

Quantum repeaters promise to enable quantum networks over global distances by circumventing the exponential decrease in success probability inherent in direct photon transmission. We propose a realistic, functionally integrated quantum-repeater implementation based on single atoms in optical cavities. Entanglement is directly generated between the single-atom quantum memory and a photon at telecom wavelength. The latter is collected with high efficiency and adjustable temporal and spectral properties into a spatially well-defined cavity mode.

Hybrid Long-Distance Entanglement Distribution Protocol

Mon, 2011-02-14 16:55 - Q-Essence Coordinator
Date: 
2010-10-11
Author(s): 

J. B. Brask, I. Rigas, E. S. Polzik, U. L. Andersen, and A. S. Sørensen

Reference: 

Phys. Rev. Lett. 105, 160501 (2010)

URL: 

http://link.aps.org/doi/10.1103/PhysRevLett.105.160501

We propose a hybrid (continuous-discrete variable) quantum repeater protocol for long-distance entanglement distribution. Starting from states created by single-photon detection, we show how entangled coherent state superpositions can be generated by means of homodyne detection. We show that near-deterministic entanglement swapping with such states is possible using only linear optics and homodyne detectors, and we evaluate the performance of our protocol combining these elements.

 

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