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Proceedings Paper

The correlation conversion property of quantum channels: distillable entanglement from classical correlation
Author(s): Laszlo Gyongyosi; Sandor Imre
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Paper Abstract

Transmission of quantum entanglement will play a crucial role in future networks and long-distance quantum communications. Quantum Key Distribution, the working mechanism of quantum repeaters and the various quantum communication protocols are all based on quantum entanglement. To share entanglement between distant points, high fidelity quantum channels are needed. In practice, these communication links are noisy, which makes it impossible or extremely difficult and expensive to distribute entanglement. In this work we first show that quantum entanglement can be generated by a new idea, exploiting the most natural effect of the communication channels: the noise itself of the link. We prove that the noise transformation of quantum channels that are not able to transmit quantum entanglement can be used to generate distillable (useable) entanglement from classically correlated input. We call this new phenomenon the Correlation Conversion property (CC-property) of quantum channels. The proposed solution does not require any nonlocal operation or local measurement by the parties, only the use of standard quantum channels. Our results have implications and consequences for the future of quantum communications, and for global-scale quantum communication networks. The discovery also revealed that entanglement generation by local operations is possible.

Paper Details

Date Published: 28 May 2013
PDF: 14 pages
Proc. SPIE 8749, Quantum Information and Computation XI, 874904 (28 May 2013); doi: 10.1117/12.2015301
Show Author Affiliations
Laszlo Gyongyosi, Budapest Univ. of Technology and Economics (Hungary)
Hungarian Academy of Sciences (Hungary)
Sandor Imre, Budapest Univ. of Technology and Economics (Hungary)

Published in SPIE Proceedings Vol. 8749:
Quantum Information and Computation XI
Eric Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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