Entanglement loss in molecular quantum-dot qubits due to interaction with the environment

We study quantum entanglement loss due to environmental interaction in a condensed matter system with a complex geometry relevant to recent proposals for computing with single electrons at the nanoscale. We consider a system consisting of two qubits, each realized by an electron in a double quantum...

ver descrição completa

Detalhes bibliográficos
Autores: Blair, Enrique P., Tóth, Géza, Lent, Craig S.
Formato: artículo
Fecha de publicación:2018
País:España
Recursos:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/28005
Acesso em linha:http://hdl.handle.net/10810/28005
Access Level:acceso abierto
Palavra-chave:quantum entanglement
quantum decoherence
quantum disentanglement state
atoms
limit
localization
inequality
system
space
id ES_63e99b858b8215babd4e0e5f72040e76
oai_identifier_str oai:addi.ehu.eus:10810/28005
network_acronym_str ES
network_name_str España
repository_id_str
spelling Entanglement loss in molecular quantum-dot qubits due to interaction with the environmentBlair, Enrique P.Tóth, GézaLent, Craig S.quantum entanglementquantum decoherencequantum disentanglement stateatomslimitlocalizationinequalitysystemspaceWe study quantum entanglement loss due to environmental interaction in a condensed matter system with a complex geometry relevant to recent proposals for computing with single electrons at the nanoscale. We consider a system consisting of two qubits, each realized by an electron in a double quantum dot, which are initially in an entangled Bell state. The qubits are widely separated and each interacts with its own environment. The environment for each is modeled by surrounding double quantum dots placed at random positions with random orientations. We calculate the unitary evolution of the joint system and environment. The global state remains pure throughout. We examine the time dependence of the expectation value of the bipartite Clauser-Horne-Shimony-Holt (CHSH) and Brukner-Paunkovic-Rudolph-Vedral (BPRV) Bell operators and explore the emergence of correlations consistent with local realism. Though the details of this transition depend on the specific environmental geometry, we show how the results can be mapped on to a universal behavior with appropriate scaling. We determine the relevant disentanglement times based on realistic physical parameters for molecular double-dots.We acknowledge support from the National Science Foundation (Grant No. DGE-1313583). We also acknowledge the support of the EU (ERC Starting Grant 258647/GEDENTQOPT, COST Action CA15220, QuantERA CEBBEC), the Spanish Ministry of Economy, Industry and Competitiveness and the European Regional Development Fund FEDER through Grant No. FIS2015-67161-P (MINECO/FEDER, EU), the Basque Government (Grant No. IT986-16), and the National Research, Development and Innovation Office NKFIH (Grant No. K124351).IOP Publishing201820182018info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/28005reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoInglésinfo:eu-repo/grantAgreement/MINECO/FIS2015-67161-P/http://iopscience.iop.org/article/10.1088/1361-648X/aab98d/metainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/es/Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Atribución 3.0 Españaoai:addi.ehu.eus:10810/280052026-06-18T09:23:17Z
dc.title.none.fl_str_mv Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
title Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
spellingShingle Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
Blair, Enrique P.
quantum entanglement
quantum decoherence
quantum disentanglement state
atoms
limit
localization
inequality
system
space
title_short Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
title_full Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
title_fullStr Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
title_full_unstemmed Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
title_sort Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
dc.creator.none.fl_str_mv Blair, Enrique P.
Tóth, Géza
Lent, Craig S.
author Blair, Enrique P.
author_facet Blair, Enrique P.
Tóth, Géza
Lent, Craig S.
author_role author
author2 Tóth, Géza
Lent, Craig S.
author2_role author
author
dc.subject.none.fl_str_mv quantum entanglement
quantum decoherence
quantum disentanglement state
atoms
limit
localization
inequality
system
space
topic quantum entanglement
quantum decoherence
quantum disentanglement state
atoms
limit
localization
inequality
system
space
description We study quantum entanglement loss due to environmental interaction in a condensed matter system with a complex geometry relevant to recent proposals for computing with single electrons at the nanoscale. We consider a system consisting of two qubits, each realized by an electron in a double quantum dot, which are initially in an entangled Bell state. The qubits are widely separated and each interacts with its own environment. The environment for each is modeled by surrounding double quantum dots placed at random positions with random orientations. We calculate the unitary evolution of the joint system and environment. The global state remains pure throughout. We examine the time dependence of the expectation value of the bipartite Clauser-Horne-Shimony-Holt (CHSH) and Brukner-Paunkovic-Rudolph-Vedral (BPRV) Bell operators and explore the emergence of correlations consistent with local realism. Though the details of this transition depend on the specific environmental geometry, we show how the results can be mapped on to a universal behavior with appropriate scaling. We determine the relevant disentanglement times based on realistic physical parameters for molecular double-dots.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018
2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/28005
url http://hdl.handle.net/10810/28005
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO/FIS2015-67161-P/
http://iopscience.iop.org/article/10.1088/1361-648X/aab98d/meta
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/es/
Atribución 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/es/
Atribución 3.0 España
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409607664795648
score 15,301603

Registos relacionados