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  Negative Wigner function at telecommunication wavelength from homodyne detection

Baune, C., Fiurasek, J., & Schnabel, R. (2017). Negative Wigner function at telecommunication wavelength from homodyne detection. Physical Review A, 95(6): 061802. doi:10.1103/PhysRevA.95.061802.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-AC3A-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-0823-A
Genre: Journal Article

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1703.02786.pdf (Preprint), 849KB
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 Creators:
Baune, Christoph1, Author
Fiurasek, Jaromir1, 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: Quantum states of light having a Wigner function with negative values represent a key resource in quantum communication and quantum information processing. Here, we present the generation of such a state at the telecommunication wavelength of 1550nm. The state is generated by means of photon subtraction from a weakly squeezed vacuum state and is heralded by the `click' of a single photon counter. Balanced homodyne detection is applied to reconstruct the Wigner function, also yielding the state's photon number distribution. The heralding photons are frequency up-converted to 532nm to allow for the use of a room-temperature (silicon) avalanche photo diode. The Wigner function reads W(0,0)=-0.063 +/- 0.004 at the origin of phase space, which certifies negativity with more than 15 standard deviations.

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 Dates: 2017-03-082017
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: arXiv: 1703.02786
DOI: 10.1103/PhysRevA.95.061802
URI: http://arxiv.org/abs/1703.02786
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Project name: Deutsche Forschungsgemeinschaft
Grant ID: SCHN 757/4-1
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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: 95 (6) Sequence Number: 061802 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925225012_2