Unified framework to determine Gaussian states in continuous-variable systems
- Autores
- Nicacio, Fernando; Valdés Hernández, Andrea; Majtey, Ana Paula; Toscano, Fabricio
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Gaussian states are the backbone of quantum information protocols with continuous-variable systems whose power relies fundamentally on the entanglement between the different modes. In the case of global pure states, knowledge of the reduced states in a given bipartition of a multipartite quantum system bears information on the entanglement in such bipartition. For Gaussian states, the reduced states are also Gaussian, so their determination requires essentially the experimental determination of their covariance matrix. Here we develop strategies to determine the covariance matrix of an arbitrary n-mode bosonic Gaussian state through measurement of the total phase acquired when appropriate metaplectic evolutions, associated with quadratic Hamiltonians, are applied. Simply one-mode metaplectic evolutions, such rotations, squeezing, and shear transformations, in addition to a single two-mode rotation, allows us to determine all the covariance matrix elements of an n-mode bosonic system. All the single-mode metaplectic evolutions are applied conditionally to a state in which an ancilla qubit is entangled with the n-mode system. The ancillary system provides, after measurement, the value of the total phase of each evolution. The proposed method is experimentally suited to implement in the most currently used continuous-variable systems.
Fil: Nicacio, Fernando. Universidade Federal do Rio de Janeiro; Brasil
Fil: Valdés Hernández, Andrea. Universidad Nacional Autónoma de México; México
Fil: Majtey, Ana Paula. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Toscano, Fabricio. Universidade Federal do Rio de Janeiro; Brasil - Materia
-
Bosonic Gaussian States
Entanglement - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/72319
Ver los metadatos del registro completo
id |
CONICETDig_767390a38754ed08efeb0a0cad89a333 |
---|---|
oai_identifier_str |
oai:ri.conicet.gov.ar:11336/72319 |
network_acronym_str |
CONICETDig |
repository_id_str |
3498 |
network_name_str |
CONICET Digital (CONICET) |
spelling |
Unified framework to determine Gaussian states in continuous-variable systemsNicacio, FernandoValdés Hernández, AndreaMajtey, Ana PaulaToscano, FabricioBosonic Gaussian StatesEntanglementhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Gaussian states are the backbone of quantum information protocols with continuous-variable systems whose power relies fundamentally on the entanglement between the different modes. In the case of global pure states, knowledge of the reduced states in a given bipartition of a multipartite quantum system bears information on the entanglement in such bipartition. For Gaussian states, the reduced states are also Gaussian, so their determination requires essentially the experimental determination of their covariance matrix. Here we develop strategies to determine the covariance matrix of an arbitrary n-mode bosonic Gaussian state through measurement of the total phase acquired when appropriate metaplectic evolutions, associated with quadratic Hamiltonians, are applied. Simply one-mode metaplectic evolutions, such rotations, squeezing, and shear transformations, in addition to a single two-mode rotation, allows us to determine all the covariance matrix elements of an n-mode bosonic system. All the single-mode metaplectic evolutions are applied conditionally to a state in which an ancilla qubit is entangled with the n-mode system. The ancillary system provides, after measurement, the value of the total phase of each evolution. The proposed method is experimentally suited to implement in the most currently used continuous-variable systems.Fil: Nicacio, Fernando. Universidade Federal do Rio de Janeiro; BrasilFil: Valdés Hernández, Andrea. Universidad Nacional Autónoma de México; MéxicoFil: Majtey, Ana Paula. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Toscano, Fabricio. Universidade Federal do Rio de Janeiro; BrasilAmerican Physical Society2017-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72319Nicacio, Fernando; Valdés Hernández, Andrea; Majtey, Ana Paula; Toscano, Fabricio; Unified framework to determine Gaussian states in continuous-variable systems; American Physical Society; Physical Review A; 96; 4; 10-2017; 1-15; 0423412469-9926CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.96.042341info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.042341info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:14Zoai:ri.conicet.gov.ar:11336/72319instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:54:14.319CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Unified framework to determine Gaussian states in continuous-variable systems |
title |
Unified framework to determine Gaussian states in continuous-variable systems |
spellingShingle |
Unified framework to determine Gaussian states in continuous-variable systems Nicacio, Fernando Bosonic Gaussian States Entanglement |
title_short |
Unified framework to determine Gaussian states in continuous-variable systems |
title_full |
Unified framework to determine Gaussian states in continuous-variable systems |
title_fullStr |
Unified framework to determine Gaussian states in continuous-variable systems |
title_full_unstemmed |
Unified framework to determine Gaussian states in continuous-variable systems |
title_sort |
Unified framework to determine Gaussian states in continuous-variable systems |
dc.creator.none.fl_str_mv |
Nicacio, Fernando Valdés Hernández, Andrea Majtey, Ana Paula Toscano, Fabricio |
author |
Nicacio, Fernando |
author_facet |
Nicacio, Fernando Valdés Hernández, Andrea Majtey, Ana Paula Toscano, Fabricio |
author_role |
author |
author2 |
Valdés Hernández, Andrea Majtey, Ana Paula Toscano, Fabricio |
author2_role |
author author author |
dc.subject.none.fl_str_mv |
Bosonic Gaussian States Entanglement |
topic |
Bosonic Gaussian States Entanglement |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Gaussian states are the backbone of quantum information protocols with continuous-variable systems whose power relies fundamentally on the entanglement between the different modes. In the case of global pure states, knowledge of the reduced states in a given bipartition of a multipartite quantum system bears information on the entanglement in such bipartition. For Gaussian states, the reduced states are also Gaussian, so their determination requires essentially the experimental determination of their covariance matrix. Here we develop strategies to determine the covariance matrix of an arbitrary n-mode bosonic Gaussian state through measurement of the total phase acquired when appropriate metaplectic evolutions, associated with quadratic Hamiltonians, are applied. Simply one-mode metaplectic evolutions, such rotations, squeezing, and shear transformations, in addition to a single two-mode rotation, allows us to determine all the covariance matrix elements of an n-mode bosonic system. All the single-mode metaplectic evolutions are applied conditionally to a state in which an ancilla qubit is entangled with the n-mode system. The ancillary system provides, after measurement, the value of the total phase of each evolution. The proposed method is experimentally suited to implement in the most currently used continuous-variable systems. Fil: Nicacio, Fernando. Universidade Federal do Rio de Janeiro; Brasil Fil: Valdés Hernández, Andrea. Universidad Nacional Autónoma de México; México Fil: Majtey, Ana Paula. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Toscano, Fabricio. Universidade Federal do Rio de Janeiro; Brasil |
description |
Gaussian states are the backbone of quantum information protocols with continuous-variable systems whose power relies fundamentally on the entanglement between the different modes. In the case of global pure states, knowledge of the reduced states in a given bipartition of a multipartite quantum system bears information on the entanglement in such bipartition. For Gaussian states, the reduced states are also Gaussian, so their determination requires essentially the experimental determination of their covariance matrix. Here we develop strategies to determine the covariance matrix of an arbitrary n-mode bosonic Gaussian state through measurement of the total phase acquired when appropriate metaplectic evolutions, associated with quadratic Hamiltonians, are applied. Simply one-mode metaplectic evolutions, such rotations, squeezing, and shear transformations, in addition to a single two-mode rotation, allows us to determine all the covariance matrix elements of an n-mode bosonic system. All the single-mode metaplectic evolutions are applied conditionally to a state in which an ancilla qubit is entangled with the n-mode system. The ancillary system provides, after measurement, the value of the total phase of each evolution. The proposed method is experimentally suited to implement in the most currently used continuous-variable systems. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-10 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 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://hdl.handle.net/11336/72319 Nicacio, Fernando; Valdés Hernández, Andrea; Majtey, Ana Paula; Toscano, Fabricio; Unified framework to determine Gaussian states in continuous-variable systems; American Physical Society; Physical Review A; 96; 4; 10-2017; 1-15; 042341 2469-9926 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/72319 |
identifier_str_mv |
Nicacio, Fernando; Valdés Hernández, Andrea; Majtey, Ana Paula; Toscano, Fabricio; Unified framework to determine Gaussian states in continuous-variable systems; American Physical Society; Physical Review A; 96; 4; 10-2017; 1-15; 042341 2469-9926 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.96.042341 info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.96.042341 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
American Physical Society |
publisher.none.fl_str_mv |
American Physical Society |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
_version_ |
1842269273333956608 |
score |
13.13397 |