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  Transformations of symmetric multipartite Gaussian states by Gaussian local operations and classical communication

Cernotík, O., & Fiurášek, J. (2014). Transformations of symmetric multipartite Gaussian states by Gaussian local operations and classical communication. Physical Review A, 89: 042331. doi:10.1103/PhysRevA.89.042331.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-110B-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-001A-110D-7
Genre: Journal Article

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 Creators:
Cernotík, Ondřej1, Author
Fiurášek, Jaromír, Author
Affiliations:
1AEI-Golm, MPI for Gravitational Physics, Max Planck Society, Golm, DE, ou_24008              

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Free keywords: Quantum Physics, quant-ph
 Abstract: Multipartite quantum correlations, in spite of years of intensive research, still leave many questions unanswered. While bipartite entanglement is relatively well understood for Gaussian states, the complexity of mere qualitative characterization grows rapidly with increasing number of parties. Here, we present two schemes for transformations of multipartite permutation invariant Gaussian states by Gaussian local operations and classical communication. To this end, we use a scheme for possible experimental realization, making use of the fact, that in this picture, the whole N - partite state can be described using two separable modes. Numerically, we study entanglement transformations of tripartite states. Finally, we look at the effect our protocols have on fidelity of assisted quantum teleportation and find that while adding correlated noise does not affect the fidelity at all, there is strong evidence that partial non-demolition measurement leads to a drop in teleportation fidelity.

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 Dates: 2014-03-042014-04-302014
 Publication Status: Published in print
 Pages: 9 pages
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1403.0737
DOI: 10.1103/PhysRevA.89.042331
URI: http://arxiv.org/abs/1403.0737
 Degree: -

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Title: Physical Review A
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 89 Sequence Number: 042331 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2