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Proceedings Paper

Quantum noise and quantum communication
Author(s): Thomas Jennewein; Anton Zeilinger
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Paper Abstract

We show how the probabilistic interpretation of quantum mechanics leads to unavoidable quantum noise, even for deterministic evolution of the quantum state. Far from being a nuisance, this consequent quantum randomness is at the heart of new concepts in technology. We discuss explicitly the quantum random number generator based on the partitition noise at the beam splitter. Another application of quantum noise is quantum cryptography, where the randomness of the detection event leads to the generation of a random cryptographic key at two locations without the necessity of transporting that key from A to B. Finally, we will show how quantum noise is an intrinsically important part of quantum teleportation, and we conclude with a brief discussion of the possibilities of free-space quantum communication.

Paper Details

Date Published: 25 May 2004
PDF: 9 pages
Proc. SPIE 5468, Fluctuations and Noise in Photonics and Quantum Optics II, (25 May 2004); doi: 10.1117/12.561308
Show Author Affiliations
Thomas Jennewein, Oesterreichische Akademie der Wissenschaften (Austria)
Univ. Wien (Austria)
Anton Zeilinger, Oesterreichische Akademie der Wissenschaften (Austria)
Univ. Wien (Austria)


Published in SPIE Proceedings Vol. 5468:
Fluctuations and Noise in Photonics and Quantum Optics II
Peter Heszler, Editor(s)

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