Greenberger-Horne-Zeilinger states in a quantum dot molecule

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DOIResolve DOI: http://doi.org/10.1103/PhysRevB.83.125311
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TypeArticle
Journal titlePhysical review. B, Condensed matter and materials physics
Volume83
Issue12
Pages125311-1125311-7; # of pages: 7
AbstractWe present a microscopic theory of a lateral quantum dot molecule in a radialmagnetic field with a Greenberger-Horne-Zeilinger (GHZ) maximally entangled three particle ground state. The quantum dot molecule consists of three quantum dots with one electron spin each forming a central equilateral triangle. The antiferromagnetic spin-spin interaction is changed to the ferromagnetic interaction by additional doubly occupied quantum dots, one dot near each side of a triangle. The magnetic field is provided by micromagnets. The interaction among the electrons is described within an extended Hubbard Hamiltonian which is solved by using exact diagonalization techniques. The set of parameters is established for which the ground state of the molecule in a radial magnetic field is well approximated by a GHZ state.
Publication date
LanguageEnglish
AffiliationNRC Institute for Microstructural Sciences; National Research Council Canada
Peer reviewedYes
NPARC number19335201
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Record identifier4f784398-82e8-47d0-a794-7e3e8fa71329
Record created2012-02-29
Record modified2016-05-09
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