Shape transitions in excited states of two-electron quantum dots in a magnetic field

We use entanglement to study shape transitions in two-electron axially symmetric parabolic quantum dots in a perpendicular magnetic field. At a specific magnetic field value the dot attains a spherical symmetry. The transition from the axial to the spherical symmetry manifests itself as a drastic ch...

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Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2012-10, Vol.45 (20), p.205503-1-4
Main Authors: Nazmitdinov, R G, Simonovi, N S, Plastino, A R, Chizhov, A V
Format: Article
Language:English
Subjects:
Angular momentum
Entanglement
magnetic
Magnetic fields
Planes
Projection
quantum dot
Quantum dots
Symmetry
Transition points
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Summary:We use entanglement to study shape transitions in two-electron axially symmetric parabolic quantum dots in a perpendicular magnetic field. At a specific magnetic field value the dot attains a spherical symmetry. The transition from the axial to the spherical symmetry manifests itself as a drastic change of the entanglement of the lowest state with zero angular momentum projection. While the electrons in such a state are always localized in the plane (x − y) before the transition point, after this point they become localized in the vertical direction.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/45/20/205503