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  Feasibility of free space quantum key distribution with coherent polarization states

Elser, D., Bartley, T., Heim, B., Wittmann, C., Sych, D., & Leuchs, G. (2009). Feasibility of free space quantum key distribution with coherent polarization states. NEW JOURNAL OF PHYSICS, 11: 045014. doi:10.1088/1367-2630/11/4/045014.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-6BF7-5 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002D-6BF8-3
Genre: Journal Article

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 Creators:
Elser, D.1, Author           
Bartley, T.2, Author
Heim, B.1, Author           
Wittmann, Ch2, Author
Sych, D.3, Author           
Leuchs, G.4, Author           
Affiliations:
1Quantum Information Processing, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364707              
2external, ou_persistent22              
3Optics Theory Group, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364706              
4Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364698              

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Free keywords: CRYPTOGRAPHY; COMMUNICATIONPhysics;
 Abstract: We demonstrate for the first time the feasibility of free space quantum key distribution with continuous variables under real atmospheric conditions. More specifically, we transmit coherent polarization states over a 100m free space channel on the roof of our institute's building. In our scheme, signal and local oscillator (LO) are combined in a single spatial mode, which auto-compensates atmospheric fluctuations and results in an excellent interference. Furthermore, the LO acts as a spatial and spectral filter, thus allowing unrestrained daylight operation.

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Language(s): eng - English
 Dates: 2009
 Publication Status: Published online
 Pages: 13
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000265678400048
DOI: 10.1088/1367-2630/11/4/045014
 Degree: -

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Title: NEW JOURNAL OF PHYSICS
Source Genre: Journal
 Creator(s):
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Publ. Info: TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND : IOP PUBLISHING LTD
Pages: - Volume / Issue: 11 Sequence Number: 045014 Start / End Page: - Identifier: ISSN: 1367-2630