Classical extension of quantum-correlated separable states
Li and Luo [<i>Phys. Rev. A</i> 78 (2008) 024303] discovered a remarkable relation between discord and entanglement. It establishes that all separable states can be obtained via reduction of a classically-correlated state "living" in a space of larger dimension. Starting from t...
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| Autores principales: | , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2015
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/132357 |
| Aporte de: |
| id |
I19-R120-10915-132357 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Exactas Física Quantum correlations quantum discord entanglement and separability |
| spellingShingle |
Ciencias Exactas Física Quantum correlations quantum discord entanglement and separability Bellomo, Guido Plastino, Ángel Luis Plastino, Ángel Ricardo Classical extension of quantum-correlated separable states |
| topic_facet |
Ciencias Exactas Física Quantum correlations quantum discord entanglement and separability |
| description |
Li and Luo [<i>Phys. Rev. A</i> 78 (2008) 024303] discovered a remarkable relation between discord and entanglement. It establishes that all separable states can be obtained via reduction of a classically-correlated state "living" in a space of larger dimension. Starting from this result, we discuss here an optimal classical extension of separable states and explore this notion for low-dimensional systems. We find that the larger the dimension of the classical extension, the larger the discord in the original separable state. Further, we analyze separable states of maximum discord in ℂ² ⊗ ℂ² and their associated classical extensions showing that, from the reduction of a classical state in (ℂ² ⊗ ℂ³) ⊗ ℂ², one can obtain a separable state of maximum discord in ℂ² ⊗ ℂ². |
| format |
Articulo Preprint |
| author |
Bellomo, Guido Plastino, Ángel Luis Plastino, Ángel Ricardo |
| author_facet |
Bellomo, Guido Plastino, Ángel Luis Plastino, Ángel Ricardo |
| author_sort |
Bellomo, Guido |
| title |
Classical extension of quantum-correlated separable states |
| title_short |
Classical extension of quantum-correlated separable states |
| title_full |
Classical extension of quantum-correlated separable states |
| title_fullStr |
Classical extension of quantum-correlated separable states |
| title_full_unstemmed |
Classical extension of quantum-correlated separable states |
| title_sort |
classical extension of quantum-correlated separable states |
| publishDate |
2015 |
| url |
http://sedici.unlp.edu.ar/handle/10915/132357 |
| work_keys_str_mv |
AT bellomoguido classicalextensionofquantumcorrelatedseparablestates AT plastinoangelluis classicalextensionofquantumcorrelatedseparablestates AT plastinoangelricardo classicalextensionofquantumcorrelatedseparablestates |
| bdutipo_str |
Repositorios |
| _version_ |
1764820456364310529 |