Emergence of intra-particle entanglement and time-varying violation of Bell's inequality in Dirac matter
De Moraes Araújo, Bruna Gabrielly (Universitat Autònoma de Barcelona. Departament de Física)
Cummings, Aron (Institut Català de Nanociència i Nanotecnologia)
Roche, Stephan (Institut Català de Nanociència i Nanotecnologia)

Date:	2020
Abstract:	We demonstrate the emergence and dynamics of intraparticle entanglement in massless Dirac fermions. This entanglement, generated by spin-orbit coupling, arises between the spin and sublattice pseudospin of electrons in graphene. The entanglement is a complex dynamic quantity but is generally large, independent of the initial state. Its time dependence implies a dynamical violation of a Bell inequality, while its magnitude indicates that large intraparticle entanglement is a general feature of graphene on a substrate. These features are also expected to impact entanglement between pairs of particles, and may be detectable in experiments that combine Cooper pair splitting with nonlocal measurements of spin-spin correlation in mesoscopic devices based on Dirac materials.
Grants:	European Commission 754558 European Commission 785219 European Commission 881603 Ministerio de Economía y Competitividad SEV-2017-0706
Note:	Altres ajuts: ICN2 is funded by the CERCA Programme/Generalitat de Catalunya.
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Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Bell inequalities ; Bell's inequality ; Complex dynamics ; Massless dirac fermions ; Mesoscopic devices ; Non-local measurement ; Spin-spin correlation ; Time dependence
Published in:	Physical review B, Vol. 102, issue 4 (Jul. 2020) , art. 041403, ISSN 2469-9969

DOI: 10.1103/PhysRevB.102.041403

Preprint 8 p, 458.3 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles