Conditional states and entropy in qudit-qubit systems
- Autores
- Bilkis, Matías; Canosa, Norma Beatriz; Rossignoli, Raúl Dante; Gigena, Nicolás Alejandro
- Año de publicación
- 2019
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We examine, in correlated mixed states of qudit-qubit systems, the set of all conditional qubit states that can be reached after local measurements at the qudit based on rank-1 projectors. While for a similar measurement at the qubit the conditional postmeasurement qudit states lie on the surface of an ellipsoid, for a measurement at the qudit we show that the set of postmeasurement qubit states can form more complex solid regions. In particular, we show the emergence, for some classes of mixed states, of sets which are the convex hull of solid ellipsoids and which may lead to conelike and trianglelike shapes in limit cases. We also analyze the associated measurement-dependent conditional entropy, providing a full analytic determination of its minimum and of the minimizing local measurement at the qudit for the previous states. Separable rank-2 mixtures are also discussed.
Instituto de Física La Plata - Materia
-
Física
Quantum correlations in quantum information
Quantum discord
Quantum entanglement - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/144021
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Conditional states and entropy in qudit-qubit systemsBilkis, MatíasCanosa, Norma BeatrizRossignoli, Raúl DanteGigena, Nicolás AlejandroFísicaQuantum correlations in quantum informationQuantum discordQuantum entanglementWe examine, in correlated mixed states of qudit-qubit systems, the set of all conditional qubit states that can be reached after local measurements at the qudit based on rank-1 projectors. While for a similar measurement at the qubit the conditional postmeasurement qudit states lie on the surface of an ellipsoid, for a measurement at the qudit we show that the set of postmeasurement qubit states can form more complex solid regions. In particular, we show the emergence, for some classes of mixed states, of sets which are the convex hull of solid ellipsoids and which may lead to conelike and trianglelike shapes in limit cases. We also analyze the associated measurement-dependent conditional entropy, providing a full analytic determination of its minimum and of the minimizing local measurement at the qudit for the previous states. Separable rank-2 mixtures are also discussed.Instituto de Física La Plata2019-06-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/144021enginfo:eu-repo/semantics/altIdentifier/issn/2469-9926info:eu-repo/semantics/altIdentifier/issn/2469-9934info:eu-repo/semantics/altIdentifier/doi/10.1103/physreva.99.062119info:eu-repo/semantics/altIdentifier/arxiv/1812.11251info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T11:04:34Zoai:sedici.unlp.edu.ar:10915/144021Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 11:04:34.516SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Conditional states and entropy in qudit-qubit systems |
title |
Conditional states and entropy in qudit-qubit systems |
spellingShingle |
Conditional states and entropy in qudit-qubit systems Bilkis, Matías Física Quantum correlations in quantum information Quantum discord Quantum entanglement |
title_short |
Conditional states and entropy in qudit-qubit systems |
title_full |
Conditional states and entropy in qudit-qubit systems |
title_fullStr |
Conditional states and entropy in qudit-qubit systems |
title_full_unstemmed |
Conditional states and entropy in qudit-qubit systems |
title_sort |
Conditional states and entropy in qudit-qubit systems |
dc.creator.none.fl_str_mv |
Bilkis, Matías Canosa, Norma Beatriz Rossignoli, Raúl Dante Gigena, Nicolás Alejandro |
author |
Bilkis, Matías |
author_facet |
Bilkis, Matías Canosa, Norma Beatriz Rossignoli, Raúl Dante Gigena, Nicolás Alejandro |
author_role |
author |
author2 |
Canosa, Norma Beatriz Rossignoli, Raúl Dante Gigena, Nicolás Alejandro |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Física Quantum correlations in quantum information Quantum discord Quantum entanglement |
topic |
Física Quantum correlations in quantum information Quantum discord Quantum entanglement |
dc.description.none.fl_txt_mv |
We examine, in correlated mixed states of qudit-qubit systems, the set of all conditional qubit states that can be reached after local measurements at the qudit based on rank-1 projectors. While for a similar measurement at the qubit the conditional postmeasurement qudit states lie on the surface of an ellipsoid, for a measurement at the qudit we show that the set of postmeasurement qubit states can form more complex solid regions. In particular, we show the emergence, for some classes of mixed states, of sets which are the convex hull of solid ellipsoids and which may lead to conelike and trianglelike shapes in limit cases. We also analyze the associated measurement-dependent conditional entropy, providing a full analytic determination of its minimum and of the minimizing local measurement at the qudit for the previous states. Separable rank-2 mixtures are also discussed. Instituto de Física La Plata |
description |
We examine, in correlated mixed states of qudit-qubit systems, the set of all conditional qubit states that can be reached after local measurements at the qudit based on rank-1 projectors. While for a similar measurement at the qubit the conditional postmeasurement qudit states lie on the surface of an ellipsoid, for a measurement at the qudit we show that the set of postmeasurement qubit states can form more complex solid regions. In particular, we show the emergence, for some classes of mixed states, of sets which are the convex hull of solid ellipsoids and which may lead to conelike and trianglelike shapes in limit cases. We also analyze the associated measurement-dependent conditional entropy, providing a full analytic determination of its minimum and of the minimizing local measurement at the qudit for the previous states. Separable rank-2 mixtures are also discussed. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-06-25 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/144021 |
url |
http://sedici.unlp.edu.ar/handle/10915/144021 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/2469-9926 info:eu-repo/semantics/altIdentifier/issn/2469-9934 info:eu-repo/semantics/altIdentifier/doi/10.1103/physreva.99.062119 info:eu-repo/semantics/altIdentifier/arxiv/1812.11251 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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openAccess |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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application/pdf |
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