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  Entangled Qubits in a non-Gaussian Quantum State

Kiesel, T., Vogel, W., Hage, B., & Schnabel, R. (2011). Entangled Qubits in a non-Gaussian Quantum State. Physical Review. A, 83(6): 062319. doi:10.1103/PhysRevA.83.062319.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-073A-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-073B-0
Genre: Journal Article

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 Creators:
Kiesel, T., Author
Vogel, W., Author
Hage, B.1, 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: We experimentally generate and tomographically characterize a mixed, genuinely non-Gaussian bipartite continuous-variable entangled state. By testing entanglement in 2$\times$2-dimensional two-qubit subspaces, entangled qubits are localized within the density matrix, which, firstly, proves the distillability of the state and, secondly, is useful to estimate the efficiency and test the applicability of distillation protocols. In our example, the entangled qubits are arranged in the density matrix in an asymmetric way, i.e. entanglement is found between diverse qubits composed of different photon number states, although the entangled state is symmetric under exchanging the modes.

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 Dates: 2010-12-032011-06-152011
 Publication Status: Published in print
 Pages: 4 pages, 4 figures, published version
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 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: 1012.0686
DOI: 10.1103/PhysRevA.83.062319
URI: http://arxiv.org/abs/1012.0686
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Title: Physical Review. A
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : Published by the American Physical Society through the American Institute of Physics
Pages: - Volume / Issue: 83 (6) Sequence Number: 062319 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: /journals/resource/954925225012_2