Quantum entanglement beyond Gaussian criteria
Most of the attention given to continuous variable systems for quantum information processing has traditionally been focused on Gaussian states. However, non-Gaussianity is an essential requirement for universal quantum computation and entanglement distillation, and can improve the efficiency of oth...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2009-12, Vol.106 (51), p.21517-21520 |
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| container_issue | 51 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
| container_volume | 106 |
| creator | Gomes, R.M Salles, A Toscano, F Souto Ribeiro, P.H Walborn, S.P |
| description | Most of the attention given to continuous variable systems for quantum information processing has traditionally been focused on Gaussian states. However, non-Gaussianity is an essential requirement for universal quantum computation and entanglement distillation, and can improve the efficiency of other quantum information tasks. Here we report the experimental observation of genuine non-Gaussian entanglement using spatially entangled photon pairs. The quantum correlations are invisible to all second-order tests, which identify only Gaussian entanglement, and are revealed only under application of a higher-order entanglement criterion. Thus, the photons exhibit a variety of entanglement that cannot be reproduced by Gaussian states. |
| doi_str_mv | 10.1073/pnas.0908329106 |
| format | Article |
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| identifier | ISSN: 0027-8424 |
| ispartof | Proceedings of the National Academy of Sciences - PNAS, 2009-12, Vol.106 (51), p.21517-21520 |
| issn | 0027-8424 1091-6490 |
| language | eng |
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| source | JSTOR Archive Collection A-Z Listing; PubMed Central; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Atoms & subatomic particles Continuous variables Crystals Distillation Electromagnetic fields Experiments Laser beams Non Gaussianity Normal distribution Photons Physical Sciences Pumps Quantum entanglement Quantum field theory Quantum states |
| title | Quantum entanglement beyond Gaussian criteria |
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