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  Unconditional entanglement interface for quantum networks

Baune, C., Gniesmer, J., Kocsis, S., Vollmer, C. E., Zell, P., Fiurasek, J., et al. (2016). Unconditional entanglement interface for quantum networks. Physical Review A, 93: 010302. doi:10.1103/PhysRevA.93.010302.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-7C83-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-83F5-6
Genre: Journal Article

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1510.00603.pdf (Preprint), 655KB
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 Creators:
Baune, Christoph, Author
Gniesmer, Jan, Author
Kocsis, Sacha, Author
Vollmer, Christina E., Author
Zell, Petrissa, Author
Fiurasek, Jaromír, Author
Schnabel, Roman1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Entanglement drives nearly all proposed quantum information technologies. The suppression of the uncertainty in joint quadrature measurements below the level of vacuum fluctuations is a signature of non-classical correlations. Entangling frequency modes of optical fields has attracted increased attention in recent years, as a quantum network would rely on interfacing light at telecommunication wavelengths with matter-based quantum memories that are addressable at visible wavelengths. By up-converting part of a 1550 nm squeezed vacuum state to 532 nm, we demonstrate the generation and complete characterization of strong continuous-variable entanglement between widely separated frequencies. Non-classical correlations were observed in joint quadrature measurements of the 1550 nm and 532 nm fields, showing a maximum noise suppression 5.5 dB below vacuum. A spectrum was measured to demonstrate over 3 dB noise suppression up to 20 MHzmeasurement frequency. Our versatile technique combines strong non-classical correlations, large bandwidth and, in principle, the ability to entangle the telecommunication wavelength of 1550 nm with any optical wavelength, making this approach highly relevant to emerging proposals for quantum communication and computing.

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 Dates: 2015-10-022016
 Publication Status: Published in print
 Pages: 5 pages, 4 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1510.00603
URI: http://arxiv.org/abs/1510.00603
DOI: 10.1103/PhysRevA.93.010302
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Title: Physical Review A
  Other : Phys. Rev. A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 93 Sequence Number: 010302 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925225012_2