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  Experimental Unconditional Preparation and Detection of a Continuous Bound Entangled State of Light

DiGuglielmo, J., Samblowski, A., Hage, B., Pineda, C., Eisert, J., & Schnabel, R. (2011). Experimental Unconditional Preparation and Detection of a Continuous Bound Entangled State of Light. Physical Review Letters, 107(24): 240503. doi:10.1103/PhysRevLett.107.240503.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-0132-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-0133-5
Genre: Journal Article
Other : Preparing the bound instance of quantum entanglement (Preprint)

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1006.4651 (Preprint), 324KB
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 Creators:
DiGuglielmo, J.1, Author              
Samblowski, A.1, Author              
Hage, B.1, Author              
Pineda, C., Author
Eisert, J., Author
Schnabel, R.1, 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: Among the possibly most intriguing aspects of quantum entanglement is that it comes in "free" and "bound" instances. Bound entangled states require entangled states in preparation but, once realized, no free entanglement and therefore no pure maximally entangled pairs can be regained. Their existence hence certifies an intrinsic irreversibility of entanglement in nature and suggests a connection with thermodynamics. In this work, we present a first experimental unconditional preparation and detection of a bound entangled state of light. We consider continuous-variable entanglement, use convex optimization to identify regimes rendering its bound character well certifiable, and realize an experiment that continuously produced a distributed bound entangled state with an extraordinary and unprecedented significance of more than ten standard deviations away from both separability and distillability. Our results show that the approach chosen allows for the efficient and precise preparation of multimode entangled states of light with various applications in quantum information, quantum state engineering and high precision metrology.

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 Dates: 2010-06-232010-12-222011
 Publication Status: Published in print
 Pages: The new version accounts for a recent comment in Nature Physics [24] clarifying that a previous claim of having generated bound entanglement [23] was not supported by the authors' data. We also extended our introduction and discussion and also added references
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 Identifiers: arXiv: 1006.4651
DOI: 10.1103/PhysRevLett.107.240503
URI: http://arxiv.org/abs/1006.4651
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y., etc. : American Physical Society.
Pages: - Volume / Issue: 107 (24) Sequence Number: 240503 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406