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  Stable control of 10 dB two-mode squeezed vacuum states of light

Eberle, T., Händchen, V., & Schnabel, R. (2013). Stable control of 10 dB two-mode squeezed vacuum states of light. Optics Express, 21, 11546-11553. doi:10.1364/OE.21.011546.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-7667-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-48D3-D
Genre: Journal Article

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 Creators:
Eberle, Tobias1, Author              
Händchen, Vitus1, Author              
Schnabel, Roman1, Author              
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Continuous variable entanglement is a fundamental resource for many quantum information tasks. Important protocols like superactivation of zero-capacity channels and finite-size quantum cryptography that provides security against most general attacks, require about 10 dB two-mode squeezing. Additionally, stable phase control mechanisms are necessary but are difficult to achieve because the total amount of optical loss to the entangled beams needs to be small. Here, we experimentally demonstrate a control scheme for two-mode squeezed vacuum states at the telecommunication wavelength of 1550 nm. Our states exhibited an Einstein-Podolsky-Rosen covariance product of 0.0309 \pm 0.0002, where 1 is the critical value, and a Duan inseparability value of 0.360 \pm 0.001, where 4 is the critical value. The latter corresponds to 10.45 \pm 0.01 dB which reflects the average non-classical noise suppression of the two squeezed vacuum states used to generate the entanglement. With the results of this work demanding quantum information protocols will become feasible.

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 Dates: 2013-05-152013
 Publication Status: Published in print
 Pages: 8 pages, 4 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1305.3383
DOI: 10.1364/OE.21.011546
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Title: Optics Express
Source Genre: Journal
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Publ. Info: Washington, DC : Optical Society of America
Pages: - Volume / Issue: 21 Sequence Number: - Start / End Page: 11546 - 11553 Identifier: ISSN: 1094-4087
CoNE: /journals/resource/954925609918