Entanglement-breaking channels and entanglement sudden death

The occurrence of entanglement sudden death in the evolution of a bipartite system depends on both the initial state and the channel responsible for the evolution. An extreme case is that of entanglement-breaking channels, which are channels that, acting on only one of the subsystems, drives them to...

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Detalles Bibliográficos
Autores principales:	Schmiegelow, Christian Tomás, Larotonda, Miguel Antonio
Publicado:	2016
Materias:	Mathematical models Physics Bipartite systems Entangled qubits Entanglement sudden death Initial state Polarization-entangled photons Quantum entanglement
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v94_n1_p_Knoll http://hdl.handle.net/20.500.12110/paper_24699926_v94_n1_p_Knoll
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_24699926_v94_n1_p_Knoll
record_format	dspace
spelling	paper:paper_24699926_v94_n1_p_Knoll2023-06-08T16:36:01Z Entanglement-breaking channels and entanglement sudden death Schmiegelow, Christian Tomás Larotonda, Miguel Antonio Mathematical models Physics Bipartite systems Entangled qubits Entanglement sudden death Initial state Polarization-entangled photons Quantum entanglement The occurrence of entanglement sudden death in the evolution of a bipartite system depends on both the initial state and the channel responsible for the evolution. An extreme case is that of entanglement-breaking channels, which are channels that, acting on only one of the subsystems, drives them to full disentanglement, regardless of the initial state. In general, one can find certain combinations of initial states and channels acting on one or both subsystems that can result in entanglement sudden death or not. Neither the channel nor the initial state are responsible for this effect but their combination. In this paper we show that, for two entangled qubits, when entanglement sudden death occurs, the evolution can be mapped to that of an effective entanglement-breaking channel on a modified initial state. Our results allow to anticipate which states will suffer entanglement sudden death or not for a given evolution. An experiment with polarization-entangled photons demonstrates the utility of this result in a variety of cases. © 2016 American Physical Society. Fil:Schmiegelow, C.T. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Larotonda, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v94_n1_p_Knoll http://hdl.handle.net/20.500.12110/paper_24699926_v94_n1_p_Knoll
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Mathematical models Physics Bipartite systems Entangled qubits Entanglement sudden death Initial state Polarization-entangled photons Quantum entanglement
spellingShingle	Mathematical models Physics Bipartite systems Entangled qubits Entanglement sudden death Initial state Polarization-entangled photons Quantum entanglement Schmiegelow, Christian Tomás Larotonda, Miguel Antonio Entanglement-breaking channels and entanglement sudden death
topic_facet	Mathematical models Physics Bipartite systems Entangled qubits Entanglement sudden death Initial state Polarization-entangled photons Quantum entanglement
description	The occurrence of entanglement sudden death in the evolution of a bipartite system depends on both the initial state and the channel responsible for the evolution. An extreme case is that of entanglement-breaking channels, which are channels that, acting on only one of the subsystems, drives them to full disentanglement, regardless of the initial state. In general, one can find certain combinations of initial states and channels acting on one or both subsystems that can result in entanglement sudden death or not. Neither the channel nor the initial state are responsible for this effect but their combination. In this paper we show that, for two entangled qubits, when entanglement sudden death occurs, the evolution can be mapped to that of an effective entanglement-breaking channel on a modified initial state. Our results allow to anticipate which states will suffer entanglement sudden death or not for a given evolution. An experiment with polarization-entangled photons demonstrates the utility of this result in a variety of cases. © 2016 American Physical Society.
author	Schmiegelow, Christian Tomás Larotonda, Miguel Antonio
author_facet	Schmiegelow, Christian Tomás Larotonda, Miguel Antonio
author_sort	Schmiegelow, Christian Tomás
title	Entanglement-breaking channels and entanglement sudden death
title_short	Entanglement-breaking channels and entanglement sudden death
title_full	Entanglement-breaking channels and entanglement sudden death
title_fullStr	Entanglement-breaking channels and entanglement sudden death
title_full_unstemmed	Entanglement-breaking channels and entanglement sudden death
title_sort	entanglement-breaking channels and entanglement sudden death
publishDate	2016
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_24699926_v94_n1_p_Knoll http://hdl.handle.net/20.500.12110/paper_24699926_v94_n1_p_Knoll
work_keys_str_mv	AT schmiegelowchristiantomas entanglementbreakingchannelsandentanglementsuddendeath AT larotondamiguelantonio entanglementbreakingchannelsandentanglementsuddendeath
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Entanglement-breaking channels and entanglement sudden death

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