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  Coarse graining the phase space of N qubits

Di Matteo, O., Sanchez-Soto, L. L., Leuchs, G., & Grassl, M. (2017). Coarse graining the phase space of N qubits. Physical Review A, 95(2): 022340. doi:10.1103/PhysRevA.95.022340.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0006-DF46-1 Version Permalink: https://hdl.handle.net/21.11116/0000-0006-DF47-0
Genre: Journal Article

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 Creators:
Di Matteo, Olivia1, Author
Sanchez-Soto, Luis L.2, Author
Leuchs, Gerd3, Author
Grassl, Markus2, Author
Affiliations:
1External Organizations, ou_persistent22              
2Quantumness, Tomography, Entanglement, and Codes, Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society, Staudtstraße 2, 91058 Erlangen, DE, ou_2364709              
3Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society, DE, ou_3164407              

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Free keywords: Quantum Physics, quant-ph
 Abstract: We develop a systematic coarse graining procedure for systems of N qubits. We exploit the underlying geometrical structures of the associated discrete
phase space to produce a coarse-grained version with reduced effective size. Our coarse-grained spaces inherit key properties of the original ones. In
particular, our procedure naturally yields a subset of the original measurement operators, which can be used to construct a coarse discrete Wigner function. These operators also constitute a systematic choice of incomplete measurements for the tomographer wishing to probe an intractably large system.

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 Dates: 2017-01-302016-11-232017-02-28
 Publication Status: Issued
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 Rev. Type: -
 Identifiers: arXiv: 1701.08630
DOI: 10.1103/PhysRevA.95.022340
URI: http://arxiv.org/abs/1701.08630
 Degree: -

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Title: Physical Review A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: 8 Volume / Issue: 95 (2) Sequence Number: 022340 Start / End Page: - Identifier: ISSN: 1050-2947
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012_2