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Article: Nonlocal noise cross correlation mediated by entangled Majorana fermions

TitleNonlocal noise cross correlation mediated by entangled Majorana fermions
Authors
Issue Date2012
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2012, v. 86 n. 7, article no. 075318 How to Cite?
AbstractDue to their nonlocality, qubits nested in Majorana bound states may be the key to realize decoherence-free quantum computation. Majorana bound states could be achieved at the ends of a one-dimensional topological superconductor. However, when the bound states couple directly to electron reservoirs their nonlocal correlation is quenched by local Andreev reflections. Here we propose a scheme to generate nonlocal noise cross correlation between two well-separated quantum dots, mediated by a pair of Majorana bound states. Both positive and negative cross correlations can be obtained by tuning the gate voltages applied to the dots. Within a limited range of finite temperatures, the cross correlation is not suppressed by thermal fluctuations. Furthermore, we show how the local Andreev reflections suppress the noise cross correlation when multiple dot energy levels are coupled to the Majorana bound states. The measurable cross correlation is expected to serve as a sensitive indicator for the generation of Majorana fermions. © 2012 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/175216
ISSN
2014 Impact Factor: 3.736
2015 SCImago Journal Rankings: 1.933
ISI Accession Number ID
References
Errata

 

DC FieldValueLanguage
dc.contributor.authorLü, HFen_US
dc.contributor.authorLu, HZen_US
dc.contributor.authorShen, SQen_US
dc.date.accessioned2012-11-26T08:54:33Z-
dc.date.available2012-11-26T08:54:33Z-
dc.date.issued2012en_US
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2012, v. 86 n. 7, article no. 075318en_US
dc.identifier.issn1098-0121en_US
dc.identifier.urihttp://hdl.handle.net/10722/175216-
dc.description.abstractDue to their nonlocality, qubits nested in Majorana bound states may be the key to realize decoherence-free quantum computation. Majorana bound states could be achieved at the ends of a one-dimensional topological superconductor. However, when the bound states couple directly to electron reservoirs their nonlocal correlation is quenched by local Andreev reflections. Here we propose a scheme to generate nonlocal noise cross correlation between two well-separated quantum dots, mediated by a pair of Majorana bound states. Both positive and negative cross correlations can be obtained by tuning the gate voltages applied to the dots. Within a limited range of finite temperatures, the cross correlation is not suppressed by thermal fluctuations. Furthermore, we show how the local Andreev reflections suppress the noise cross correlation when multiple dot energy levels are coupled to the Majorana bound states. The measurable cross correlation is expected to serve as a sensitive indicator for the generation of Majorana fermions. © 2012 American Physical Society.en_US
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_US
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_US
dc.rightsPhysical Review B. Copyright © American Physical Society.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleNonlocal noise cross correlation mediated by entangled Majorana fermionsen_US
dc.typeArticleen_US
dc.identifier.emailLu, HZ: luhz@hku.hken_US
dc.identifier.authorityLu, HZ=rp01599en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1103/PhysRevB.86.075318en_US
dc.identifier.scopuseid_2-s2.0-84865614938en_US
dc.identifier.hkuros212539-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84865614938&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume86en_US
dc.identifier.issue7en_US
dc.identifier.spagearticle no. 075318-
dc.identifier.epagearticle no. 075318-
dc.identifier.isiWOS:000308004400006-
dc.publisher.placeUnited Statesen_US
dc.relation.erratumdoi:10.1103/PhysRevB.88.159908-
dc.identifier.scopusauthoridLü, HF=55349326600en_US
dc.identifier.scopusauthoridLu, HZ=24376662200en_US
dc.identifier.scopusauthoridShen, SQ=55348739100en_US

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