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Conference Paper/Proceeding/Abstract 1197 views

Time optimal information transfer in spintronics networks

Frank C Langbein, Sophie Schirmer, Edmond Jonckheere, Sophie Shermer Orcid Logo

Pages: 6454 - 6459

Swansea University Author: Sophie Shermer Orcid Logo

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DOI (Published version): 10.1109/CDC.2015.7403236

Abstract

Propagation of information encoded in spin degrees of freedom through networks of coupled spins enables important applications in spintronics and quantum information processing. We study control of information propagation in networks of spin-1/2 particles with uniform nearest neighbor couplings form...

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ISBN: 978-1-4799-7884-7
Published: Osaka IEEE 2015
URI: https://cronfa.swan.ac.uk/Record/cronfa23894
first_indexed 2016-04-04T00:54:53Z
last_indexed 2018-05-26T18:27:35Z
id cronfa23894
recordtype SURis
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spelling 2018-05-26T17:30:44.5393284 v2 23894 2015-10-22 Time optimal information transfer in spintronics networks 6ebef22eb31eafc75aedcf5bfe487777 0000-0002-5530-7750 Sophie Shermer Sophie Shermer true false 2015-10-22 BGPS Propagation of information encoded in spin degrees of freedom through networks of coupled spins enables important applications in spintronics and quantum information processing. We study control of information propagation in networks of spin-1/2 particles with uniform nearest neighbor couplings forming a ring with a single excitation in the network as simple prototype of a router for spin-based information. Specifically optimizing spatially distributed potentials, which remain constant during information transfer, simplifies the implementation of the routing scheme. However, the limited degrees of freedom makes finding a control that maximizes the transfer probability in a short time difficult. We show that the structure of the eigenvalues and eigenvectors must fulfill a specific condition to be able to maximize the transfer fidelity, and demonstrate that a specific choice among the many potential structures that fulfill this condition significantly improves the solutions found by optimal control. Conference Paper/Proceeding/Abstract 6454 6459 IEEE Osaka 978-1-4799-7884-7 quantum spintronics, robust control 31 12 2015 2015-12-31 10.1109/CDC.2015.7403236 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University 2018-05-26T17:30:44.5393284 2015-10-22T22:36:07.1753171 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Frank C Langbein 1 Sophie Schirmer 2 Edmond Jonckheere 3 Sophie Shermer 0000-0002-5530-7750 4
title Time optimal information transfer in spintronics networks
spellingShingle Time optimal information transfer in spintronics networks
Sophie Shermer
title_short Time optimal information transfer in spintronics networks
title_full Time optimal information transfer in spintronics networks
title_fullStr Time optimal information transfer in spintronics networks
title_full_unstemmed Time optimal information transfer in spintronics networks
title_sort Time optimal information transfer in spintronics networks
author_id_str_mv 6ebef22eb31eafc75aedcf5bfe487777
author_id_fullname_str_mv 6ebef22eb31eafc75aedcf5bfe487777_***_Sophie Shermer
author Sophie Shermer
author2 Frank C Langbein
Sophie Schirmer
Edmond Jonckheere
Sophie Shermer
format Conference Paper/Proceeding/Abstract
container_start_page 6454
publishDate 2015
institution Swansea University
isbn 978-1-4799-7884-7
doi_str_mv 10.1109/CDC.2015.7403236
publisher IEEE
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description Propagation of information encoded in spin degrees of freedom through networks of coupled spins enables important applications in spintronics and quantum information processing. We study control of information propagation in networks of spin-1/2 particles with uniform nearest neighbor couplings forming a ring with a single excitation in the network as simple prototype of a router for spin-based information. Specifically optimizing spatially distributed potentials, which remain constant during information transfer, simplifies the implementation of the routing scheme. However, the limited degrees of freedom makes finding a control that maximizes the transfer probability in a short time difficult. We show that the structure of the eigenvalues and eigenvectors must fulfill a specific condition to be able to maximize the transfer fidelity, and demonstrate that a specific choice among the many potential structures that fulfill this condition significantly improves the solutions found by optimal control.
published_date 2015-12-31T18:46:06Z
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score 11.04748

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